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-rw-r--r--src/Xanthous/Generators/CaveAutomata.hs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/Xanthous/Generators/CaveAutomata.hs b/src/Xanthous/Generators/CaveAutomata.hs
index a2f0a165e3c1..fd4c68ddbe90 100644
--- a/src/Xanthous/Generators/CaveAutomata.hs
+++ b/src/Xanthous/Generators/CaveAutomata.hs
@@ -98,6 +98,7 @@ generate' params dims = do
   let steps' = params ^. steps
   when (steps' > 0)
    $ for_ [0 .. pred steps'] . const $ stepAutomata cells dims params
+  lift $ fillOuterEdgesM cells
   pure cells
 
 stepAutomata :: forall s g. MCells s -> Dimensions -> Params -> CellM g s ()