diff --git a/opencl/tools/cltrace/cltrace.cpp b/opencl/tools/cltrace/cltrace.cpp
index be96298737..5ac5b62738 100644
--- a/opencl/tools/cltrace/cltrace.cpp
+++ b/opencl/tools/cltrace/cltrace.cpp
@@ -17,6 +17,7 @@
 #include <iostream>
 #include <cstring>
 #include <cstdlib>
+#include <cstdint>
 
 #ifdef _MSC_VER
 #include <windows.h>