diff --git a/src/backend/storage/lmgr/proc.c b/src/backend/storage/lmgr/proc.c
index 32df8c85a1..eb321f72ea 100644
--- a/src/backend/storage/lmgr/proc.c
+++ b/src/backend/storage/lmgr/proc.c
@@ -851,7 +851,7 @@ ProcKill(int code, Datum arg)
 
 	/*
 	 * Detach from any lock group of which we are a member.  If the leader
-	 * exist before all other group members, it's PGPROC will remain allocated
+	 * exist before all other group members, its PGPROC will remain allocated
 	 * until the last group process exits; that process must return the
 	 * leader's PGPROC to the appropriate list.
 	 */