diff --git a/src/c3nav/routing/room.py b/src/c3nav/routing/room.py
index 48d7d053..1e41c689 100644
--- a/src/c3nav/routing/room.py
+++ b/src/c3nav/routing/room.py
@@ -179,10 +179,9 @@ class GraphRoom():
 
     def build_connections(self):
         for area in self.areas:
-            pass  # area.build_connections()
+            area.build_connections()
 
     def connection_count(self):
-        # print(np.count_nonzero(self.distances != np.inf))
         return np.count_nonzero(self.distances != np.inf)
 
     def finish_build(self):
@@ -190,11 +189,9 @@ class GraphRoom():
         self.points = np.array(tuple(point.i for point in self._built_points))
         self.room_transfer_points = np.array(tuple(i for i in self.points if i in self.level.room_transfer_points))
 
-        mapping = {from_i: to_i for to_i, from_i in enumerate(self.points)}
-
-        self.distances = np.empty(shape=(len(self.points), len(self.points)), dtype=np.float16)
+        mapping = {point.i: i for i, point in enumerate(self._built_points)}
+        self.distances = np.empty(shape=(len(self._built_points), len(self._built_points)), dtype=np.float16)
         self.distances[:] = np.inf
-
         for from_point in self._built_points:
             for to_point, connection in from_point.connections.items():
                 if to_point.i in mapping: