diff --git a/src/backend/utils/adt/varchar.c b/src/backend/utils/adt/varchar.c
index 09c483d6ff8..a63c498181e 100644
--- a/src/backend/utils/adt/varchar.c
+++ b/src/backend/utils/adt/varchar.c
@@ -1086,7 +1086,7 @@ hashbpcharextended(PG_FUNCTION_ARGS)
 			Size		bsize;
 			uint8_t    *buf;
 
-			ulen = icu_to_uchar(&uchar, VARDATA_ANY(key), VARSIZE_ANY_EXHDR(key));
+			ulen = icu_to_uchar(&uchar, keydata, keylen);
 
 			bsize = ucol_getSortKey(mylocale->info.icu.ucol,
 									uchar, ulen, NULL, 0);