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-rw-r--r--crawl-ref/source/maps.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/crawl-ref/source/maps.cc b/crawl-ref/source/maps.cc
index 07da121e02..072b7c8557 100644
--- a/crawl-ref/source/maps.cc
+++ b/crawl-ref/source/maps.cc
@@ -337,7 +337,7 @@ static bool _safe_vault_place(const map_def &map,
if (lines[dp.y][dp.x] == ' ')
continue;
- if (dgn_Map_Mask[cp.x][cp.y] == MMT_VAULT)
+ if (dgn_Map_Mask[cp.x][cp.y] & MMT_VAULT)
return (false);
const dungeon_feature_type dfeat = grd(cp);