1 files changed, 4 insertions, 3 deletions
diff --git a/src/Scope.js b/src/Scope.js
index 1b93418f..687d3628 100644
--- a/src/Scope.js
+++ b/src/Scope.js
@@ -97,7 +97,7 @@ function createScope(parent, services, existing) {
     $set: bind(instance, setter, instance),
 
     $eval: function $eval(exp) {
-      if (isDefined(exp)) {
+      if (exp) {
         return expressionCompile(exp).apply(instance, slice.call(arguments, 1, arguments.length));
       } else {
         foreach(evalLists.sorted, function(list) {
@@ -127,10 +127,11 @@ function createScope(parent, services, existing) {
       var watch = expressionCompile(watchExp),
           last;
       function watcher(){
-        var value = watch.call(instance);
+        var value = watch.call(instance),
+            lastValue = last;
         if (last !== value) {
-          instance.$tryEval(listener, exceptionHandler, value, last);
           last = value;
+          instance.$tryEval(listener, exceptionHandler, value, lastValue);
         }
       }
       instance.$onEval(PRIORITY_WATCH, watcher);