diff --git a/src/video/windows/wmmsg.h b/src/video/windows/wmmsg.h
index 1e038a94b..d959f7c76 100644
--- a/src/video/windows/wmmsg.h
+++ b/src/video/windows/wmmsg.h
@@ -21,7 +21,7 @@
 
 #define MAX_WMMSG   (sizeof(wmtab)/sizeof(wmtab[0]))
 
-char *wmtab[] = {
+const char *wmtab[] = {
     "WM_NULL",
     "WM_CREATE",
     "WM_DESTROY",