diff --git a/CHANGES.current b/CHANGES.current
index 3379b5af6..298efabf6 100644
--- a/CHANGES.current
+++ b/CHANGES.current
@@ -4,6 +4,8 @@ See the RELEASENOTES file for a summary of changes in each release.
 
 Version 2.0.5 (in progress)
 ===========================
+2011-08-30: szager
+	    [python] Bug 3400486, fix error signalling for built-in constructors.
 
 2011-08-26: wsfulton
             [Go] Fix file/line number display for "gotype" when using typemap debugging options
diff --git a/Source/Modules/python.cxx b/Source/Modules/python.cxx
index 619e99e86..34f7248ca 100644
--- a/Source/Modules/python.cxx
+++ b/Source/Modules/python.cxx
@@ -2545,7 +2545,7 @@ public:
     }
 
     if (builtin_ctor)
-      Append(f->code, "    return resultobj == Py_None ? 1 : 0;\n");
+      Append(f->code, "    return resultobj == Py_None ? -1 : 0;\n");
     else
       Append(f->code, "    return resultobj;\n");