diff --git a/src/main/org/apache/tools/ant/Project.java b/src/main/org/apache/tools/ant/Project.java
index c64293738..3110aec2f 100644
--- a/src/main/org/apache/tools/ant/Project.java
+++ b/src/main/org/apache/tools/ant/Project.java
@@ -285,7 +285,7 @@ public class Project {
     }
 
     public void setName(String name) {
-        setUserProperty("project.name",  name);
+        setUserProperty("ant.project.name",  name);
         this.name = name;
     }