diff --git a/internal/sm2ec/p256_asm_s390x.s b/internal/sm2ec/p256_asm_s390x.s
index cdc29fb..69746f3 100644
--- a/internal/sm2ec/p256_asm_s390x.s
+++ b/internal/sm2ec/p256_asm_s390x.s
@@ -276,7 +276,7 @@ loop_select:
 	VAB  SEL2, ONE, SEL2
 	ADD  $96, P1ptr
 	ADD  $1, COUNT
-	CMPBNE  COUNT, $32, loop_select
+	CMPBLE  COUNT, LIMIT, loop_select
 	//CMPW COUNT, $33
 	//BLT  loop_select