diff --git a/src/main/java/hudson/plugins/parameterizedtrigger/BlockingBehaviour.java b/src/main/java/hudson/plugins/parameterizedtrigger/BlockingBehaviour.java
index 746f1e26..09c50cf4 100644
--- a/src/main/java/hudson/plugins/parameterizedtrigger/BlockingBehaviour.java
+++ b/src/main/java/hudson/plugins/parameterizedtrigger/BlockingBehaviour.java
@@ -86,7 +86,7 @@ public boolean mapBuildStepResult(Result r) {
     public Result mapBuildResult(Result r) {
         if (failureThreshold!=null && r.isWorseOrEqualTo(failureThreshold))   return FAILURE;
         if (unstableThreshold!=null && r.isWorseOrEqualTo(unstableThreshold))  return UNSTABLE;
-        return SUCCESS;
+        return null;
     }
 
     @Extension