diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index d251fddc0b..4bfa62e916 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -337,7 +337,7 @@ pgstat_init(void)
 	 * compile-time cross-check that we didn't.
 	 */
 	StaticAssertStmt(sizeof(PgStat_Msg) <= PGSTAT_MAX_MSG_SIZE,
-				   'maximum stats message size exceeds PGSTAT_MAX_MSG_SIZE');
+				   "maximum stats message size exceeds PGSTAT_MAX_MSG_SIZE");
 
 	/*
 	 * Create the UDP socket for sending and receiving statistic messages