diff --git a/Source/Invocation.m b/Source/Invocation.m
index 48a76a1ef..6f99cb88f 100644
--- a/Source/Invocation.m
+++ b/Source/Invocation.m
@@ -49,7 +49,7 @@
 #endif /* not STDC_HEADERS and not HAVE_STRING_H */
 
 /* xxx Perhaps make this an ivar. */
-#define return_retained 1
+#define return_retained 0
 
 @implementation Invocation