Add extra DECREF.
diff --git a/Python/import.c b/Python/import.c
index d6d941f..fd912ba 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -42,6 +42,7 @@
 		fatal("no mem for module table");
 	if (sysset("modules", v) != 0)
 		fatal("can't assign sys.modules");
+	DECREF(v);
 }
 
 object *