diff --git a/qbsp/outside.cc b/qbsp/outside.cc
index d393cebf..b17d6670 100644
--- a/qbsp/outside.cc
+++ b/qbsp/outside.cc
@@ -498,6 +498,9 @@ bool FillOutside(node_t *node, const int hullnum)
             exit(1);
         }
 
+        // clear occupied state, so areas can be flooded in Q2
+        ClearOccupied_r(node);
+
         return false;
     }