diff --git a/lib/minimap-element.coffee b/lib/minimap-element.coffee
index a5dc2f25..d10727fa 100644
--- a/lib/minimap-element.coffee
+++ b/lib/minimap-element.coffee
@@ -370,7 +370,7 @@ class MinimapElement extends HTMLElement
   # Internal: Polling callback used to detect visibility and size changes.
   pollDOM: ->
     if @isVisible()
-      @requestForcedUpdate() unless !@wasVisible
+      @requestForcedUpdate() unless @wasVisible
 
       @measureHeightAndWidth(false)
 
diff --git a/spec/minimap-element-spec.coffee b/spec/minimap-element-spec.coffee
index 19286ae2..497270d6 100644
--- a/spec/minimap-element-spec.coffee
+++ b/spec/minimap-element-spec.coffee
@@ -267,6 +267,8 @@ describe 'MinimapElement', ->
 
         describe 'from hidden to visible', ->
           beforeEach ->
+            editorElement.style.display = 'none'
+            minimapElement.checkForVisibilityChange()
             spyOn(minimapElement, 'requestForcedUpdate')
             editorElement.style.display = ''
             minimapElement.pollDOM()