diff --git a/src/bin/pg_upgrade/server.c b/src/bin/pg_upgrade/server.c
index 969e5d6..a13800f 100644
--- a/src/bin/pg_upgrade/server.c
+++ b/src/bin/pg_upgrade/server.c
@@ -14,6 +14,8 @@
 
 static PGconn *get_db_conn(ClusterInfo *cluster, const char *db_name);
 
+static bool exit_hook_registered = false;
+
 
 /*
  * connectToServer()
@@ -174,7 +176,6 @@ start_postmaster(ClusterInfo *cluster, bool throw_error)
 {
 	char		cmd[MAXPGPATH * 4 + 1000];
 	PGconn	   *conn;
-	bool		exit_hook_registered = false;
 	bool		pg_ctl_return = false;
 	char		socket_string[MAXPGPATH + 200];