diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7ed28c0..c616f9a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 ### Bugfixes
 - In cloned scenes Locked Door Alerts will now only highlight the door in the correct scene
 - When adding a door to a synchronization group it will now assume the correct state if it's being synchronized with it's twin door on a cloned map
+- Fixed a bug that allowed synchonized doors to be opened dispite them being locked
 
 ## v1.0.1
 - When adding a door to a synchronization group adjust it's state to bring it in sync with the other doors
diff --git a/main.js b/main.js
index 1f8f04e..9df7c00 100644
--- a/main.js
+++ b/main.js
@@ -313,7 +313,7 @@ function synchronizedDoorsLeftClick() {
 		return false
 
 	// If the door is locked there is nothing to synchronize
-	if (this.state === states.LOCKED)
+	if (state === states.LOCKED)
 		return false
 
 	// Calculate new door state