diff --git a/source/duke3d/src/cmdline.cpp b/source/duke3d/src/cmdline.cpp
index c1c43facf..fa1cb024f 100644
--- a/source/duke3d/src/cmdline.cpp
+++ b/source/duke3d/src/cmdline.cpp
@@ -87,7 +87,7 @@ void G_ShowParameterHelp(void)
         ;
 #ifdef WM_MSGBOX_WINDOW
     Bsnprintf(tempbuf, sizeof(tempbuf), HEAD2 " %s", s_buildRev);
-    wm_msgbox(tempbuf, "%s", s);
+    wm_msgbox(tempbuf, s);
 #else
     initprintf("%s\n", s);
 #endif
@@ -123,7 +123,7 @@ void G_ShowDebugHelp(void)
         ;
 #ifdef WM_MSGBOX_WINDOW
     Bsnprintf(tempbuf, sizeof(tempbuf), HEAD2 " %s", s_buildRev);
-    wm_msgbox(tempbuf, "%s", s);
+    wm_msgbox(tempbuf, s);
 #else
     initprintf("%s\n", s);
 #endif