diff --git a/src/backend/utils/init/postinit.c b/src/backend/utils/init/postinit.c
index c172d3a30e9..5dba5d2a5ba 100644
--- a/src/backend/utils/init/postinit.c
+++ b/src/backend/utils/init/postinit.c
@@ -485,7 +485,7 @@ InitializeMaxBackends(void)
 
 	/* the extra unit accounts for the autovacuum launcher */
 	MaxBackends = MaxConnections + autovacuum_max_workers + 1 +
-		+max_worker_processes;
+		max_worker_processes;
 
 	/* internal error because the values were all checked previously */
 	if (MaxBackends > MAX_BACKENDS)