diff --git a/opencl/openclwrapper.cpp b/opencl/openclwrapper.cpp
index 0cb3e07382..28a11f397b 100644
--- a/opencl/openclwrapper.cpp
+++ b/opencl/openclwrapper.cpp
@@ -1,5 +1,5 @@
 #ifdef _WIN32
-#include <Windows.h>
+#include <windows.h>
 #include <io.h>
 
 #else