diff --git a/projects/rocshmem/CMakeLists.txt b/projects/rocshmem/CMakeLists.txt
index 17571a15e7..58f3b79e76 100644
--- a/projects/rocshmem/CMakeLists.txt
+++ b/projects/rocshmem/CMakeLists.txt
@@ -214,6 +214,11 @@ if (NOT BUILD_TESTS_ONLY)
       -fgpu-rdc
   )
 
+  if(${ROCM_MAJOR_VERSION} LESS 7)
+    # ROCm 6.x requires us to explicitly enable warp sync builtins
+    target_compile_definitions(${PROJECT_NAME} PRIVATE HIP_ENABLE_WARP_SYNC_BUILTINS=1)
+  endif()
+
   #############################################################################
   # INSTALL
   #############################################################################