diff --git a/include/wine/unicode.h b/include/wine/unicode.h
index 22bb6ddf3fb..ff6f6568a53 100644
--- a/include/wine/unicode.h
+++ b/include/wine/unicode.h
@@ -31,6 +31,10 @@
 #error This file should not be used in Wine tests
 #endif
 
+#ifdef __WINE_USE_MSVCRT
+#error This file should not be used with msvcrt headers
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif
diff --git a/programs/xcopy/xcopy.c b/programs/xcopy/xcopy.c
index eb8c3f04ef0..0d31d7c7d91 100644
--- a/programs/xcopy/xcopy.c
+++ b/programs/xcopy/xcopy.c
@@ -46,7 +46,6 @@
 #include <stdlib.h>
 #include <windows.h>
 #include <wine/debug.h>
-#include <wine/unicode.h>
 #include "xcopy.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(xcopy);