diff --git a/src/backend/access/heap/tuptoaster.c b/src/backend/access/heap/tuptoaster.c
index ce44bbd..d230387 100644
--- a/src/backend/access/heap/tuptoaster.c
+++ b/src/backend/access/heap/tuptoaster.c
@@ -2155,7 +2155,7 @@ toast_open_indexes(Relation toastrel,
 	 * wrong if there is nothing.
 	 */
 	if (!found)
-		elog(ERROR, "no valid index found for toast relation with Oid %d",
+		elog(ERROR, "no valid index found for toast relation with Oid %u",
 			 RelationGetRelid(toastrel));
 
 	return res;
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index c7f41a5..c25ac31 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4540,7 +4540,7 @@ pgstat_recv_inquiry(PgStat_MsgInquiry *msg, int len)
 	DBWriteRequest *newreq;
 	PgStat_StatDBEntry *dbentry;
 
-	elog(DEBUG2, "received inquiry for %d", msg->databaseid);
+	elog(DEBUG2, "received inquiry for %u", msg->databaseid);
 
 	/*
 	 * Find the last write request for this DB.  If it's older than the
@@ -4598,7 +4598,7 @@ pgstat_recv_inquiry(PgStat_MsgInquiry *msg, int len)
 			writetime = pstrdup(timestamptz_to_str(dbentry->stats_timestamp));
 			mytime = pstrdup(timestamptz_to_str(cur_ts));
 			elog(LOG,
-			"stats_timestamp %s is later than collector's time %s for db %d",
+			"stats_timestamp %s is later than collector's time %s for db %u",
 				 writetime, mytime, dbentry->databaseid);
 			pfree(writetime);
 			pfree(mytime);
diff --git a/src/backend/replication/logical/reorderbuffer.c b/src/backend/replication/logical/reorderbuffer.c
index 6e75398..cd132c1 100644
--- a/src/backend/replication/logical/reorderbuffer.c
+++ b/src/backend/replication/logical/reorderbuffer.c
@@ -2458,7 +2458,7 @@ ReorderBufferToastAppendChunk(ReorderBuffer *rb, ReorderBufferTXN *txn,
 	Pointer		chunk;
 	TupleDesc	desc = RelationGetDescr(relation);
 	Oid			chunk_id;
-	Oid			chunk_seq;
+	int32		chunk_seq;
 
 	if (txn->toast_hash == NULL)
 		ReorderBufferToastInitHash(rb, txn);
diff --git a/src/bin/pg_dump/parallel.c b/src/bin/pg_dump/parallel.c
index 0a9ac02..a59508f 100644
--- a/src/bin/pg_dump/parallel.c
+++ b/src/bin/pg_dump/parallel.c
@@ -821,7 +821,7 @@ lockTableNoWait(ArchiveHandle *AH, TocEntry *te)
 					  "       pg_class.relname "
 					  "  FROM pg_class "
 					"  JOIN pg_namespace on pg_namespace.oid = relnamespace "
-					  " WHERE pg_class.oid = %d", te->catalogId.oid);
+					  " WHERE pg_class.oid = %u", te->catalogId.oid);
 
 	res = PQexec(AH->connection, query->data);