diff --git a/core/src/main/java/hudson/Main.java b/core/src/main/java/hudson/Main.java
index 769f830369..2468b861ba 100644
--- a/core/src/main/java/hudson/Main.java
+++ b/core/src/main/java/hudson/Main.java
@@ -78,7 +78,7 @@ public class Main {
     private static String getHudsonHome() {
         String home = EnvVars.masterEnvVars.get("JENKINS_HOME");
         if (home!=null) return home;
-        return EnvVars.masterEnvVars.get("JENKINS_HOME");
+        return EnvVars.masterEnvVars.get("HUDSON_HOME");
     }
 
     /**