diff --git a/crypto/ec/p256-x86_64.c b/crypto/ec/p256-x86_64.c
index f71b4317b..2b2bec364 100644
--- a/crypto/ec/p256-x86_64.c
+++ b/crypto/ec/p256-x86_64.c
@@ -50,7 +50,7 @@ static const BN_ULONG ONE[P256_LIMBS] = {
 /* Precomputed tables for the default generator */
 #include "p256-x86_64-table.h"
 
-/* Recode window to a signed digit, see ecp_nistputil.c for details */
+/* Recode window to a signed digit, see util-64.c for details */
 static unsigned booth_recode_w5(unsigned in) {
   unsigned s, d;