diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c
index 41bccb46a87..6b9e10bffa0 100644
--- a/src/backend/postmaster/postmaster.c
+++ b/src/backend/postmaster/postmaster.c
@@ -596,6 +596,9 @@ PostmasterMain(int argc, char *argv[])
 
 	IsPostmasterEnvironment = true;
 
+	for (i = 0; i < MAXLISTEN; i++)
+		ListenSocket[i] = PGINVALID_SOCKET;
+
 	/*
 	 * Start our win32 signal implementation
 	 */
@@ -1176,12 +1179,9 @@ PostmasterMain(int argc, char *argv[])
 	/*
 	 * Establish input sockets.
 	 *
-	 * First, mark them all closed, and set up an on_proc_exit function that's
-	 * charged with closing the sockets again at postmaster shutdown.
+	 * Set up an on_proc_exit function that's charged with closing the sockets
+	 * again at postmaster shutdown.
 	 */
-	for (i = 0; i < MAXLISTEN; i++)
-		ListenSocket[i] = PGINVALID_SOCKET;
-
 	on_proc_exit(CloseServerPorts, 0);
 
 	if (ListenAddresses)