diff --git a/apps/i2ptunnel/java/src/net/i2p/i2ptunnel/I2PTunnelServer.java b/apps/i2ptunnel/java/src/net/i2p/i2ptunnel/I2PTunnelServer.java
index f782c9e0a4ee3f6fdd7a226e20f89bf88e250526..c18112908c410f768a40fc3af847ffa02e187d59 100644
--- a/apps/i2ptunnel/java/src/net/i2p/i2ptunnel/I2PTunnelServer.java
+++ b/apps/i2ptunnel/java/src/net/i2p/i2ptunnel/I2PTunnelServer.java
@@ -233,7 +233,7 @@ public class I2PTunnelServer extends I2PTunnelTask implements Runnable {
             try {
                 _filter = FilterFactory.createFilter(context, filterDefinition);
             } catch (IOException | InvalidDefinitionException bad) {
-                throw new IllegalArgumentException("Can't create socket manager "+bad.getMessage(), bad);
+                throw new IllegalArgumentException("Bad filter definition file: " + bad.getMessage(), bad);
             }
         }