diff --git a/src/bin/pg_basebackup/receivelog.c b/src/bin/pg_basebackup/receivelog.c
index 48ab385c48..6639771852 100644
--- a/src/bin/pg_basebackup/receivelog.c
+++ b/src/bin/pg_basebackup/receivelog.c
@@ -62,7 +62,7 @@ open_walfile(XLogRecPtr startpoint, uint32 timeline, char *basedir, char *namebu
 	f = open(fn, O_WRONLY | O_CREAT | PG_BINARY, S_IRUSR | S_IWUSR);
 	if (f == -1)
 	{
-		fprintf(stderr, _("%s: Could not open WAL segment %s: %s\n"),
+		fprintf(stderr, _("%s: could not open WAL segment %s: %s\n"),
 				progname, fn, strerror(errno));
 		return -1;
 	}