diff --git a/Messages.st b/Messages.st
index 82d4bfc..b5be3ce 100644
--- a/Messages.st
+++ b/Messages.st
@@ -65,7 +65,7 @@ Object subclass: IEMessage [
                 ].
             ].
 
-        ^ Exception signal: 'Unsupported IE type: ', type asString.
+        ^self error: 'Unsupported IE type: ', type asString.
     ]
 
     IEMessage class >> decode: aStream with: aIEBase [