diff --git a/src/backend/commands/collationcmds.c b/src/backend/commands/collationcmds.c
index 4075f991a03..b601ca4d68c 100644
--- a/src/backend/commands/collationcmds.c
+++ b/src/backend/commands/collationcmds.c
@@ -594,7 +594,7 @@ pg_import_system_collations(PG_FUNCTION_ARGS)
 				continue;
 			}
 
-			enc = pg_get_encoding_from_locale(localebuf, false);
+			enc = pg_get_encoding_from_locale(localebuf, /*write_message=*/true);
 			if (enc < 0)
 			{
 				/* error message printed by pg_get_encoding_from_locale() */