diff --git a/programs/progman/program.c b/programs/progman/program.c
index 40ff409..51a4e54 100644
--- a/programs/progman/program.c
+++ b/programs/progman/program.c
@@ -4,7 +4,9 @@
  * Copyright 1996 Ulrich Schmid
  */
 
+#include <string.h>
 #include "windows.h"
+#include "windowsx.h"
 #include "progman.h"
 
 /***********************************************************************