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-rw-r--r--crawl-ref/source/dungeon.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/crawl-ref/source/dungeon.cc b/crawl-ref/source/dungeon.cc
index d21832d7f3..dbba93e9a6 100644
--- a/crawl-ref/source/dungeon.cc
+++ b/crawl-ref/source/dungeon.cc
@@ -1420,7 +1420,7 @@ static bool _fixup_stone_stairs(bool preserve_vault_stairs)
int s1 = s % num_stairs;
int s2 = (s1 + 1) % num_stairs;
ASSERT(grd(stair_list[s2]) >= base
- && grd(stair_list[s2]) <= base + 3);
+ && grd(stair_list[s2]) < base + 3);
if (grd(stair_list[s1]) == grd(stair_list[s2]))
{