diff --git a/lib/tokenBucket.js b/lib/tokenBucket.js
index 6d78862..bac8c5b 100644
--- a/lib/tokenBucket.js
+++ b/lib/tokenBucket.js
@@ -137,7 +137,7 @@ TokenBucket.prototype = {
       return false;
 
     // Try to remove the requested tokens from the parent bucket
-    if (this.parentBucket && !this.parent.tryRemoveTokens(count))
+    if (this.parentBucket && !this.parentBucket.tryRemoveTokens(count))
       return false;
 
     // Remove the requested tokens from this bucket and return