diff --git a/src/main/org/apache/tools/ant/taskdefs/Javac.java b/src/main/org/apache/tools/ant/taskdefs/Javac.java
index e2c024bbe..74168efcb 100644
--- a/src/main/org/apache/tools/ant/taskdefs/Javac.java
+++ b/src/main/org/apache/tools/ant/taskdefs/Javac.java
@@ -1122,7 +1122,7 @@ public class Javac extends MatchingTask {
                 continue;
             }
             String pkg = path.substring(0, path.length() - suffix.length());
-            packageInfos.put(pkg, Long.valueOf(f.lastModified()));
+            packageInfos.put(pkg, new Long(f.lastModified()));
         }
     }