diff --git a/base64_s390x.s b/base64_s390x.s
index c4425a9..84ab8fd 100644
--- a/base64_s390x.s
+++ b/base64_s390x.s
@@ -63,9 +63,9 @@ loop:
 	VL (R2), X0
 	VPERM X0, X0, RESHUFFLE_MASK, X0
 	VN X0, MULHI_MASK, X1
-	VMLHH(X1, MULHI_CONST, X1)
+	VMLHH X1, MULHI_CONST, X1
 	VN X0, MULLO_MASK, X2
-	VMLHW(X2, MULLO_CONST, X2)
+	VMLHW X2, MULLO_CONST, X2
 	VO X1, X2, X0
 
 	VSB RANGE1_END, X0, X1