diff --git a/doc/fixes34.0 b/doc/fixes34.0
index e856dddc3..b13f6d021 100644
--- a/doc/fixes34.0
+++ b/doc/fixes34.0
@@ -448,6 +448,7 @@ fixed a few places where unblock_point wasn't called but should have been
 cloned monsters should have the same name and tameness as the original
 you should stop eating (etc.) if a monster attacks you and misses
 half physical damage should apply to gas spores
+iron bars should affect wall corner wallification
 
 
 Platform- and/or Interface-Specific Fixes
diff --git a/src/mkmaze.c b/src/mkmaze.c
index 6319246b0..9448b584e 100644
--- a/src/mkmaze.c
+++ b/src/mkmaze.c
@@ -29,9 +29,12 @@ STATIC_OVL boolean
 iswall(x,y)
 int x,y;
 {
-	if (!isok(x,y)) return FALSE;
-	return (IS_WALL(levl[x][y].typ) || IS_DOOR(levl[x][y].typ)
-		|| levl[x][y].typ == SDOOR);
+    register int type;
+
+    if (!isok(x,y)) return FALSE;
+    type = levl[x][y].typ;
+    return (IS_WALL(type) || IS_DOOR(type) ||
+	    type == SDOOR || type == IRONBARS);
 }
 
 STATIC_OVL boolean
@@ -44,7 +47,8 @@ iswall_or_stone(x,y)
     if (!isok(x,y)) return TRUE;
 
     type = levl[x][y].typ;
-    return (type == STONE || IS_WALL(type) || IS_DOOR(type) || type == SDOOR);
+    return (type == STONE || IS_WALL(type) || IS_DOOR(type) ||
+	    type == SDOOR || type == IRONBARS);
 }
 
 /* return TRUE if out of bounds, wall or rock */