diff --git a/src/heretic/d_main.c b/src/heretic/d_main.c
index 246e4082..97b1c07f 100644
--- a/src/heretic/d_main.c
+++ b/src/heretic/d_main.c
@@ -963,6 +963,9 @@ void D_DoomMain(void)
         printf("Playing demo %s.\n", file);
     }
 
+    // Generate the WAD hash table.  Speed things up a bit.
+    W_GenerateHashTable();
+
     //!
     // @category demo
     //