diff --git a/AsyncDisplayKit/ASDisplayNode.mm b/AsyncDisplayKit/ASDisplayNode.mm
index ead40263..78ebea17 100644
--- a/AsyncDisplayKit/ASDisplayNode.mm
+++ b/AsyncDisplayKit/ASDisplayNode.mm
@@ -2688,13 +2688,11 @@ static const char *ASDisplayNodeDrawingPriorityKey = "ASDrawingPriority";
 
 - (ASEnvironmentState)environmentState
 {
-  ASDN::MutexLocker l(_propertyLock);
   return _environmentState;
 }
 
 - (void)setEnvironmentState:(ASEnvironmentState)environmentState
 {
-  ASDN::MutexLocker l(_propertyLock);
   _environmentState = environmentState;
 }
 
diff --git a/AsyncDisplayKit/Layout/ASLayoutSpec.mm b/AsyncDisplayKit/Layout/ASLayoutSpec.mm
index 7d899597..8932e275 100644
--- a/AsyncDisplayKit/Layout/ASLayoutSpec.mm
+++ b/AsyncDisplayKit/Layout/ASLayoutSpec.mm
@@ -169,13 +169,11 @@
 
 - (ASEnvironmentState)environmentState
 {
-  ASDN::MutexLocker l(_propertyLock);
   return _environmentState;
 }
 
 - (void)setEnvironmentState:(ASEnvironmentState)environmentState
 {
-  ASDN::MutexLocker l(_propertyLock);
   _environmentState = environmentState;
 }