@@ -62,11 +62,11 @@
 		OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
 
 		if (![[element name] isEqual: [self className]] ||
 		    ![[element namespace] isEqual: OF_SERIALIZATION_NS])
 			@throw [OFInvalidArgumentException
-			    exceptionWithClass: isa
+			    exceptionWithClass: [self class]
 				      selector: _cmd];
 
 		name = [[[element attributeForName: @"name"] stringValue]
 		    copy];
 		ns = [[[element attributeForName: @"namespace"] stringValue]