diff --git a/ChangeLog b/ChangeLog
index 7659795092ad035a0a48512a6a95fd2bf551d898..82de3a48172cb5e7668f6e2eaa43a30e408cb31f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2020-11-28  Niels Möller  <nisse@lysator.liu.se>
 
+	* powerpc64/p7/chacha-2core.asm: Simplify counter carry handling
+	using the vaddcuw instruction.
+
 	Merge changes by Marco Bodrato and Torbjorn Granlund, from the
 	gmp/mini-gmp copy of this file.
 	* run-tests: Delete special handling of zero arguments. Update
diff --git a/powerpc64/p7/chacha-2core.asm b/powerpc64/p7/chacha-2core.asm
index 265918b604c96bf0831a7558bf4d295eca8a016d..4d4f49064321048fe04cab2e38d1893b412186f2 100644
--- a/powerpc64/p7/chacha-2core.asm
+++ b/powerpc64/p7/chacha-2core.asm
@@ -73,9 +73,7 @@ PROLOGUE(_nettle_chacha_2core)
 
 	lxvw4x	VSR(X3), r8, SRC
 
-	vsubuwm	X0, X0, X1	C {-1,0,...,0}
-	vcmpequw Y3, X3, X0
-	vand	Y3, Y3, X1	C Counter carry out
+	vaddcuw	Y3, X3, X1	C Counter carry out
 	vsldoi	Y3, Y3, Y3, 12
 	vor	Y3, Y3, X1