diff --git a/src/lines-component.coffee b/src/lines-component.coffee
index 4908221f4..52c81ba06 100644
--- a/src/lines-component.coffee
+++ b/src/lines-component.coffee
@@ -212,7 +212,7 @@ LinesComponent = React.createClass
 
     # Find a common prefix
     for scope, i in desiredScopes
-      break unless scopeStack[i]?.scope is desiredScopes[i]
+      break unless scopeStack[i] is desiredScopes[i]
 
     # Pop scopes until we're at the common prefx
     until scopeStack.length is i