diff --git a/core/src/main/java/hudson/model/AbstractProject.java b/core/src/main/java/hudson/model/AbstractProject.java
index 1532b722e7094bfee889bb611d77a0bf7ad641fa..1bbd06b5c884b31b77b246355c6770354a9340f0 100644
--- a/core/src/main/java/hudson/model/AbstractProject.java
+++ b/core/src/main/java/hudson/model/AbstractProject.java
@@ -402,6 +402,14 @@ public abstract class AbstractProject<P extends AbstractProject<P,R>,R extends A
     public boolean getHasCustomQuietPeriod() {
         return quietPeriod!=null;
     }
+
+    /**
+     * Sets the custom quiet period of this project, or revert to the global default if null is given. 
+     */
+    public void setQuitPeriod(Integer seconds) throws IOException {
+        this.quietPeriod = seconds;
+        save();
+    }
     
     public boolean hasCustomScmCheckoutRetryCount(){
         return scmCheckoutRetryCount != null;