diff --git a/src/main/org/apache/tools/ant/taskdefs/Jar.java b/src/main/org/apache/tools/ant/taskdefs/Jar.java
index 3bd29eee9..87e17083f 100644
--- a/src/main/org/apache/tools/ant/taskdefs/Jar.java
+++ b/src/main/org/apache/tools/ant/taskdefs/Jar.java
@@ -670,7 +670,7 @@ public class Jar extends Zip {
                     }
                 }
             } catch (Throwable t) {
-                log("error while reading original manifest: " + t.getMessage(),
+                log("error while reading original manifest in file: " + zipFile.toString() + t.getMessage(),
                     Project.MSG_WARN);
                 needsUpdate = true;
             }