diff --git a/src/backend/commands/sequence.c b/src/backend/commands/sequence.c
index c98f981..25c57f6 100644
--- a/src/backend/commands/sequence.c
+++ b/src/backend/commands/sequence.c
@@ -433,7 +433,7 @@ AlterSequence(AlterSeqStmt *stmt)
 		aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_CLASS,
 					   stmt->sequence->relname);
 
-	/* lock page' buffer and read tuple into new sequence structure */
+	/* lock page buffer and read tuple into new sequence structure */
 	seq = read_seq_tuple(elm, seqrel, &buf, &seqtuple);
 
 	/* Copy old values of options into workspace */
@@ -582,7 +582,7 @@ nextval_internal(Oid relid)
 		return elm->last;
 	}
 
-	/* lock page' buffer and read tuple */
+	/* lock page buffer and read tuple */
 	seq = read_seq_tuple(elm, seqrel, &buf, &seqtuple);
 	page = BufferGetPage(buf);
 
@@ -876,7 +876,7 @@ do_setval(Oid relid, int64 next, bool iscalled)
 	 */
 	PreventCommandIfParallelMode("setval()");
 
-	/* lock page' buffer and read tuple */
+	/* lock page buffer and read tuple */
 	seq = read_seq_tuple(elm, seqrel, &buf, &seqtuple);
 
 	if ((next < seq->min_value) || (next > seq->max_value))