diff --git a/minigrid/envs/doorkey.py b/minigrid/envs/doorkey.py
index 39724968f..43c07f840 100644
--- a/minigrid/envs/doorkey.py
+++ b/minigrid/envs/doorkey.py
@@ -91,7 +91,7 @@ def _gen_grid(self, width, height):
         self.place_agent(size=(splitIdx, height))
 
         # Place a door in the wall
-        doorIdx = self._rand_int(1, width - 2)
+        doorIdx = self._rand_int(1, height - 2)
         self.put_obj(Door("yellow", is_locked=True), splitIdx, doorIdx)
 
         # Place a yellow key on the left side