diff --git a/fileinstall/src/main/java/org/apache/felix/fileinstall/DirectoryWatcher.java b/fileinstall/src/main/java/org/apache/felix/fileinstall/DirectoryWatcher.java
index e8cc589..7dd71d1 100644
--- a/fileinstall/src/main/java/org/apache/felix/fileinstall/DirectoryWatcher.java
+++ b/fileinstall/src/main/java/org/apache/felix/fileinstall/DirectoryWatcher.java
@@ -388,6 +388,10 @@
         if (log == null)
         {
             System.out.println(message + (e == null ? "" : ": " + e));
+            if (debug > 0 && e != null)
+            {
+                e.printStackTrace(System.out);
+            }
         }
         else
         {