diff --git a/src/bin/pg_basebackup/pg_recvlogical.c b/src/bin/pg_basebackup/pg_recvlogical.c
index ebeb12d497..f235d6fecf 100644
--- a/src/bin/pg_basebackup/pg_recvlogical.c
+++ b/src/bin/pg_basebackup/pg_recvlogical.c
@@ -556,7 +556,7 @@ StreamLogicalLog(void)
 
 			if (ret < 0)
 			{
-				pg_log_error("could not write %u bytes to log file \"%s\": %m",
+				pg_log_error("could not write %d bytes to log file \"%s\": %m",
 							 bytes_left, outfile);
 				goto error;
 			}
@@ -568,7 +568,7 @@ StreamLogicalLog(void)
 
 		if (write(outfd, "\n", 1) != 1)
 		{
-			pg_log_error("could not write %u bytes to log file \"%s\": %m",
+			pg_log_error("could not write %d bytes to log file \"%s\": %m",
 						 1, outfile);
 			goto error;
 		}
diff --git a/src/bin/pg_basebackup/receivelog.c b/src/bin/pg_basebackup/receivelog.c
index 2d4f660daa..e9489f7dcb 100644
--- a/src/bin/pg_basebackup/receivelog.c
+++ b/src/bin/pg_basebackup/receivelog.c
@@ -1133,7 +1133,7 @@ ProcessXLogDataMsg(PGconn *conn, StreamCtl *stream, char *copybuf, int len,
 		if (stream->walmethod->write(walfile, copybuf + hdr_len + bytes_written,
 									 bytes_to_write) != bytes_to_write)
 		{
-			pg_log_error("could not write %u bytes to WAL file \"%s\": %s",
+			pg_log_error("could not write %d bytes to WAL file \"%s\": %s",
 						 bytes_to_write, current_walfile_name,
 						 stream->walmethod->getlasterror());
 			return false;