diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index b7b2346e18f..b4a1ff6efcf 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -72,7 +72,7 @@ static object *PosixError; /* Exception posix.error */
 
 /* Set a POSIX-specific error from errno, and return NULL */
 
-extern object *
+static object *
 posix_error()
 {
 	return err_errno(PosixError);