diff --git a/src/vector/vimageloader.cpp b/src/vector/vimageloader.cpp
index 4f3f84062b..6ddedf243f 100644
--- a/src/vector/vimageloader.cpp
+++ b/src/vector/vimageloader.cpp
@@ -4,7 +4,7 @@
 #ifndef WIN32
 #include <dlfcn.h>
 #else
-#include <Windows.h>
+#include <windows.h>
 #endif
 #include <cstring>