diff --git a/bin/hipify-perl b/bin/hipify-perl
index 1cfc82eae4..8116cfbe7c 100755
--- a/bin/hipify-perl
+++ b/bin/hipify-perl
@@ -1638,34 +1638,34 @@ sub transformKernelLaunch {
     my $k = 0;
 
     # Handle the kern<...><<<Dg, Db, Ns, S>>>() syntax with empty args:
-    $k += s/(\w+)\s*<(.+)>\s*<<<\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\((\s*)\)/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), $5, $6)/g;
+    $k += s/([:|\w]+)\s*<(.+)>\s*<<<\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\((\s*)\)/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), $5, $6)/g;
     # Handle the kern<<<Dg, Db, Ns, S>>>() syntax with empty args:
-    $k += s/(\w+)\s*<<<\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\((\s*)\)/hipLaunchKernelGGL($1, dim3($2), dim3($3), $4, $5)/g;
+    $k += s/([:|\w]+)\s*<<<\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\((\s*)\)/hipLaunchKernelGGL($1, dim3($2), dim3($3), $4, $5)/g;
 
     # Handle the kern<...><<<Dg, Db, Ns, S>>>(...) syntax with non-empty args:
-    $k += s/(\w+)\s*<(.+)>\s*<<<\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\(/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), $5, $6, /g;
+    $k += s/([:|\w]+)\s*<(.+)>\s*<<<\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\(/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), $5, $6, /g;
     # Handle the kern<<<Dg, Db, Ns, S>>>(...) syntax with non-empty args:
-    $k += s/(\w+)\s*<<<\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\(/hipLaunchKernelGGL($1, dim3($2), dim3($3), $4, $5, /g;
+    $k += s/([:|\w]+)\s*<<<\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\(/hipLaunchKernelGGL($1, dim3($2), dim3($3), $4, $5, /g;
 
     # Handle the kern<...><<<Dg, Db, Ns>>>() syntax with empty args:
-    $k += s/(\w+)\s*<(.+)>\s*<<<\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\((\s*)\)/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), $5, 0)/g;
+    $k += s/([:|\w]+)\s*<(.+)>\s*<<<\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\((\s*)\)/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), $5, 0)/g;
     # Handle the kern<<<Dg, Db, Ns>>>() syntax with empty args:
-    $k += s/(\w+)\s*<<<\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\((\s*)\)/hipLaunchKernelGGL($1, dim3($2), dim3($3), $4, 0)/g;
+    $k += s/([:|\w]+)\s*<<<\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\((\s*)\)/hipLaunchKernelGGL($1, dim3($2), dim3($3), $4, 0)/g;
 
     # Handle the kern<...><<Dg, Db, Ns>>>(...) syntax with non-empty args:
-    $k += s/(\w+)\s*<(.+)>\s*<<<\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\(/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), $5, 0, /g;
+    $k += s/([:|\w]+)\s*<(.+)>\s*<<<\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\(/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), $5, 0, /g;
     # Handle the kern<<<Dg, Db, Ns>>>(...) syntax with non-empty args:
-    $k += s/(\w+)\s*<<<\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\(/hipLaunchKernelGGL($1, dim3($2), dim3($3), $4, 0, /g;
+    $k += s/([:|\w]+)\s*<<<\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\(/hipLaunchKernelGGL($1, dim3($2), dim3($3), $4, 0, /g;
 
     # Handle the kern<...><<<Dg, Db>>>() syntax with empty args:
-    $k += s/(\w+)\s*<(.+)>\s*<<<\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\((\s*)\)/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), 0, 0)/g;
+    $k += s/([:|\w]+)\s*<(.+)>\s*<<<\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\((\s*)\)/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), 0, 0)/g;
     # Handle the kern<<<Dg, Db>>>() syntax with empty args:
-    $k += s/(\w+)\s*<<<\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\((\s*)\)/hipLaunchKernelGGL($1, dim3($2), dim3($3), 0, 0)/g;
+    $k += s/([:|\w]+)\s*<<<\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\((\s*)\)/hipLaunchKernelGGL($1, dim3($2), dim3($3), 0, 0)/g;
 
     # Handle the kern<...><<<Dg, Db>>>(...) syntax with non-empty args:
-    $k += s/(\w+)\s*<(.+)>\s*<<<\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\(/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), 0, 0, /g;
+    $k += s/([:|\w]+)\s*<(.+)>\s*<<<\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\(/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), 0, 0, /g;
     # Handle the kern<<<Dg, Db>>>(...) syntax with non-empty args:
-    $k += s/(\w+)\s*<<<\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\(/hipLaunchKernelGGL($1, dim3($2), dim3($3), 0, 0, /g;
+    $k += s/([:|\w]+)\s*<<<\s*(.+)\s*,\s*(.+)\s*>>>(\s*)\(/hipLaunchKernelGGL($1, dim3($2), dim3($3), 0, 0, /g;
 
     if ($k) {
         $ft{'kernel_launch'} += $k;
diff --git a/hipify-clang/src/CUDA2HIP_Perl.cpp b/hipify-clang/src/CUDA2HIP_Perl.cpp
index f0a7c093f8..9bbb52a2fa 100644
--- a/hipify-clang/src/CUDA2HIP_Perl.cpp
+++ b/hipify-clang/src/CUDA2HIP_Perl.cpp
@@ -213,35 +213,36 @@ namespace perl {
     *streamPtr.get() << tab << no_warns << endl;
     *streamPtr.get() << tab << my_k << endl_2;
 
+    string s_k = "$k += s/([:|\\w]+)\\s*";
     *streamPtr.get() << tab << "# Handle the kern<...><<<Dg, Db, Ns, S>>>() syntax with empty args:" << endl;
-    *streamPtr.get() << tab << "$k += s/(\\w+)\\s*<(.+)>\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\((\\s*)\\)/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), $5, $6)/g;" << endl;
+    *streamPtr.get() << tab << s_k << "<(.+)>\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\((\\s*)\\)/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), $5, $6)/g;" << endl;
     *streamPtr.get() << tab << "# Handle the kern<<<Dg, Db, Ns, S>>>() syntax with empty args:" << endl;
-    *streamPtr.get() << tab << "$k += s/(\\w+)\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\((\\s*)\\)/hipLaunchKernelGGL($1, dim3($2), dim3($3), $4, $5)/g;" << endl_2;
+    *streamPtr.get() << tab << s_k << "<<<\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\((\\s*)\\)/hipLaunchKernelGGL($1, dim3($2), dim3($3), $4, $5)/g;" << endl_2;
 
     *streamPtr.get() << tab << "# Handle the kern<...><<<Dg, Db, Ns, S>>>(...) syntax with non-empty args:" << endl;
-    *streamPtr.get() << tab << "$k += s/(\\w+)\\s*<(.+)>\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\(/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), $5, $6, /g;" << endl;
+    *streamPtr.get() << tab << s_k << "<(.+)>\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\(/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), $5, $6, /g;" << endl;
     *streamPtr.get() << tab << "# Handle the kern<<<Dg, Db, Ns, S>>>(...) syntax with non-empty args:" << endl;
-    *streamPtr.get() << tab << "$k += s/(\\w+)\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\(/hipLaunchKernelGGL($1, dim3($2), dim3($3), $4, $5, /g;" << endl_2;
+    *streamPtr.get() << tab << s_k << "<<<\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\(/hipLaunchKernelGGL($1, dim3($2), dim3($3), $4, $5, /g;" << endl_2;
 
     *streamPtr.get() << tab << "# Handle the kern<...><<<Dg, Db, Ns>>>() syntax with empty args:" << endl;
-    *streamPtr.get() << tab << "$k += s/(\\w+)\\s*<(.+)>\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\((\\s*)\\)/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), $5, 0)/g;" << endl;
+    *streamPtr.get() << tab << s_k << "<(.+)>\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\((\\s*)\\)/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), $5, 0)/g;" << endl;
     *streamPtr.get() << tab << "# Handle the kern<<<Dg, Db, Ns>>>() syntax with empty args:" << endl;
-    *streamPtr.get() << tab << "$k += s/(\\w+)\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\((\\s*)\\)/hipLaunchKernelGGL($1, dim3($2), dim3($3), $4, 0)/g;" << endl_2;
+    *streamPtr.get() << tab << s_k << "<<<\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\((\\s*)\\)/hipLaunchKernelGGL($1, dim3($2), dim3($3), $4, 0)/g;" << endl_2;
 
     *streamPtr.get() << tab << "# Handle the kern<...><<Dg, Db, Ns>>>(...) syntax with non-empty args:" << endl;
-    *streamPtr.get() << tab << "$k += s/(\\w+)\\s*<(.+)>\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\(/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), $5, 0, /g;" << endl;
+    *streamPtr.get() << tab << s_k << "<(.+)>\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\(/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), $5, 0, /g;" << endl;
     *streamPtr.get() << tab << "# Handle the kern<<<Dg, Db, Ns>>>(...) syntax with non-empty args:" << endl;
-    *streamPtr.get() << tab << "$k += s/(\\w+)\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\(/hipLaunchKernelGGL($1, dim3($2), dim3($3), $4, 0, /g;" << endl_2;
+    *streamPtr.get() << tab << s_k << "<<<\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\(/hipLaunchKernelGGL($1, dim3($2), dim3($3), $4, 0, /g;" << endl_2;
 
     *streamPtr.get() << tab << "# Handle the kern<...><<<Dg, Db>>>() syntax with empty args:" << endl;
-    *streamPtr.get() << tab << "$k += s/(\\w+)\\s*<(.+)>\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\((\\s*)\\)/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), 0, 0)/g;" << endl;
+    *streamPtr.get() << tab << s_k << "<(.+)>\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\((\\s*)\\)/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), 0, 0)/g;" << endl;
     *streamPtr.get() << tab << "# Handle the kern<<<Dg, Db>>>() syntax with empty args:" << endl;
-    *streamPtr.get() << tab << "$k += s/(\\w+)\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\((\\s*)\\)/hipLaunchKernelGGL($1, dim3($2), dim3($3), 0, 0)/g;" << endl_2;
+    *streamPtr.get() << tab << s_k << "<<<\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\((\\s*)\\)/hipLaunchKernelGGL($1, dim3($2), dim3($3), 0, 0)/g;" << endl_2;
 
     *streamPtr.get() << tab << "# Handle the kern<...><<<Dg, Db>>>(...) syntax with non-empty args:" << endl;
-    *streamPtr.get() << tab << "$k += s/(\\w+)\\s*<(.+)>\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\(/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), 0, 0, /g;" << endl;
+    *streamPtr.get() << tab << s_k << "<(.+)>\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\(/hipLaunchKernelGGL(HIP_KERNEL_NAME($1<$2>), dim3($3), dim3($4), 0, 0, /g;" << endl;
     *streamPtr.get() << tab << "# Handle the kern<<<Dg, Db>>>(...) syntax with non-empty args:" << endl;
-    *streamPtr.get() << tab << "$k += s/(\\w+)\\s*<<<\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\(/hipLaunchKernelGGL($1, dim3($2), dim3($3), 0, 0, /g;" << endl_2;
+    *streamPtr.get() << tab << s_k << "<<<\\s*(.+)\\s*,\\s*(.+)\\s*>>>(\\s*)\\(/hipLaunchKernelGGL($1, dim3($2), dim3($3), 0, 0, /g;" << endl_2;
 
     *streamPtr.get() << tab << "if ($k) {" << endl;
     *streamPtr.get() << tab_2 << "$ft{'kernel_launch'} += $k;" << endl;
diff --git a/tests/hipify-clang/unit_tests/namespace/ns_kernel_launch.cu b/tests/hipify-clang/unit_tests/namespace/ns_kernel_launch.cu
new file mode 100644
index 0000000000..0d9fa1cf3f
--- /dev/null
+++ b/tests/hipify-clang/unit_tests/namespace/ns_kernel_launch.cu
@@ -0,0 +1,28 @@
+// RUN: %run_test hipify "%s" "%t" %hipify_args %clang_args
+// CHECK: #include <hip/hip_runtime.h>
+#include <cuda.h>
+
+__global__ void test_0() {
+  int a = 10;
+}
+
+namespace first {
+  __global__ void test_1() {
+    int b = 20;
+  }
+  namespace second {
+    __global__ void test_2() {
+      int c = 30;
+    }
+  }
+}
+
+int main() {
+  // CHECK: hipLaunchKernelGGL(::test_0, dim3(1), dim3(1), 0, 0);
+  ::test_0<<<1, 1>>>();
+  // CHECK: hipLaunchKernelGGL(first::test_1, dim3(1), dim3(1), 0, 0);
+  first::test_1<<<1, 1>>>();
+  // CHECK: hipLaunchKernelGGL(first::second::test_2, dim3(1), dim3(1), 0, 0);
+  first::second::test_2<<<1, 1>>>();
+  return 0;
+}