diff --git a/src/utilite/UConversion.cpp b/src/utilite/UConversion.cpp
index 65378384..bec0536c 100644
--- a/src/utilite/UConversion.cpp
+++ b/src/utilite/UConversion.cpp
@@ -24,6 +24,10 @@
 #include <string.h>
 #include <stdio.h>
 
+#ifdef WIN32
+#include <windows.h>
+#endif
+
 std::string uReplaceChar(const std::string & str, char before, char after)
 {
 	std::string result = str;