diff --git a/lib/main.coffee b/lib/main.coffee
index 1cc82594..5384c453 100644
--- a/lib/main.coffee
+++ b/lib/main.coffee
@@ -270,7 +270,7 @@ class Main
   # Returns a `Disposable`.
   observeMinimaps: (iterator) ->
     return unless iterator?
-    @editorsMinimaps.forEach (minimap) -> iterator(minimap)
+    @editorsMinimaps?.forEach (minimap) -> iterator(minimap)
     createdCallback = (minimap) -> iterator(minimap)
     disposable = @onDidCreateMinimap(createdCallback)
     disposable.off = ->