diff --git a/src/sp_lev.c b/src/sp_lev.c
index bf6096e32..b3b369c73 100755
--- a/src/sp_lev.c
+++ b/src/sp_lev.c
@@ -2686,7 +2686,7 @@ fill_special_room(croom, prefilled)
 struct mkroom *croom;
 boolean prefilled;
 {
-    if (!croom || croom->rtype == OROOM)
+    if (!croom || croom->rtype == OROOM || croom->rtype == THEMEROOM)
         return;
 
     if (!prefilled) {