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-rw-r--r--crawl-ref/source/dungeon.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/crawl-ref/source/dungeon.cc b/crawl-ref/source/dungeon.cc
index 53658c2a58..c5f6a788ca 100644
--- a/crawl-ref/source/dungeon.cc
+++ b/crawl-ref/source/dungeon.cc
@@ -975,6 +975,7 @@ void dgn_reset_level()
// Forget level properties.
env.properties.clear();
+ env.heightmap.reset(NULL);
// Set up containers for storing some level generation info.
env.properties[LEVEL_VAULTS_KEY].new_table();