diff --git a/Libraries/CustomComponents/Navigator/Navigator.js b/Libraries/CustomComponents/Navigator/Navigator.js
index 6589e7d78..dc9c99ca6 100644
--- a/Libraries/CustomComponents/Navigator/Navigator.js
+++ b/Libraries/CustomComponents/Navigator/Navigator.js
@@ -922,7 +922,19 @@ var Navigator = React.createClass({
   },
 
   pop: function() {
-    this._popN(1);
+    if (this.state.transitionQueue.length) {
+      // This is the workaround to prevent user from firing multiple `pop()`
+      // calls that may pop the routes beyond the limit.
+      // Because `this.state.presentedIndex` does not update until the
+      // transition starts, we can't reliably use `this.state.presentedIndex`
+      // to know whether we can safely keep popping the routes or not at this
+      //  moment.
+      return;
+    }
+
+    if (this.state.presentedIndex > 0) {
+      this._popN(1);
+    }
   },
 
   /**