diff --git a/source/de/anomic/http/httpHeader.java b/source/de/anomic/http/httpHeader.java
index 5b24a08eb..73669fe24 100644
--- a/source/de/anomic/http/httpHeader.java
+++ b/source/de/anomic/http/httpHeader.java
@@ -492,7 +492,7 @@ public final class httpHeader extends TreeMap implements Map {
     }
     
     public String userAgent() {
-        return (String) get(USER_AGENT);
+        return (String) get(USER_AGENT, "");
     }
     
     public long age() {