diff --git a/src/main/org/apache/tools/ant/taskdefs/Expand.java b/src/main/org/apache/tools/ant/taskdefs/Expand.java
index 9606c1476..afa767f0e 100644
--- a/src/main/org/apache/tools/ant/taskdefs/Expand.java
+++ b/src/main/org/apache/tools/ant/taskdefs/Expand.java
@@ -144,7 +144,8 @@ public class Expand extends Task {
 
             log("expand complete", Project.MSG_VERBOSE);
         } catch (IOException ioe) {
-            throw new BuildException("Error while expanding " + srcF.getPath(),
+            throw new BuildException("Error while expanding " + srcF.getPath()
+                    +"\n"+ioe.toString(),
                                      ioe);
         } finally {
             ZipFile.closeQuietly(zf);