diff --git a/linuxdoom-1.10/d_main.c b/linuxdoom-1.10/d_main.c
index 23427e8cf..0d5276287 100644
--- a/linuxdoom-1.10/d_main.c
+++ b/linuxdoom-1.10/d_main.c
@@ -584,7 +584,7 @@ void IdentifyVersion (void)
     sprintf(doom2wad, "%s/doom2.wad", doomwaddir);
 
     // Retail.
-    doomuwad = malloc(strlen(doomwaddir)+1+8+1);
+    doomuwad = malloc(strlen(doomwaddir)+1+9+1);
     sprintf(doomuwad, "%s/doomu.wad", doomwaddir);
     
     // Registered.