diff --git a/lib/chain/chainentry.js b/lib/chain/chainentry.js
index edb3e23f..507e2917 100644
--- a/lib/chain/chainentry.js
+++ b/lib/chain/chainentry.js
@@ -371,7 +371,7 @@ ChainEntry.prototype.hasBit = function hasBit(deployment) {
   var bits = this.version & constants.versionbits.TOP_MASK;
   var topBits = constants.versionbits.TOP_BITS;
   var mask = 1 << deployment.bit;
-  return bits === topBits && (this.version & mask) !== 0;
+  return (bits >>> 0) === topBits && (this.version & mask) !== 0;
 };
 
 ChainEntry.prototype.__defineGetter__('rhash', function() {