diff --git a/src/ng/q.js b/src/ng/q.js
index cc39967c50eb..f6133d4dbd49 100644
--- a/src/ng/q.js
+++ b/src/ng/q.js
@@ -375,7 +375,12 @@ function qFactory(nextTick, exceptionHandler) {
       then: function(callback, errback) {
         var result = defer();
         nextTick(function() {
-          result.resolve((isFunction(errback) ? errback : defaultErrback)(reason));
+          try {
+            result.resolve((isFunction(errback) ? errback : defaultErrback)(reason));
+          } catch (e) {
+            result.reject(e);
+            exceptionHandler(e);
+          }
         });
         return result.promise;
       }