diff --git a/src/secp256k1/include/secp256k1_schnorr.h b/src/secp256k1/include/secp256k1_schnorr.h
index afbae8604..60137fc32 100644
--- a/src/secp256k1/include/secp256k1_schnorr.h
+++ b/src/secp256k1/include/secp256k1_schnorr.h
@@ -1,57 +1,57 @@
 #ifndef _SECP256K1_SCHNORR_
 # define _SECP256K1_SCHNORR_
 
 # include "secp256k1.h"
 
 # ifdef __cplusplus
 extern "C" {
 # endif
 
 /**
  * Verify a signature created by secp256k1_schnorr_sign.
  * Returns: 1: correct signature
  *          0: incorrect signature
  * Args:    ctx:       a secp256k1 context object, initialized for verification.
  * In:      sig64:     the 64-byte signature being verified (cannot be NULL)
  *          msg32:     the 32-byte message hash being verified (cannot be NULL)
  *          pubkey:    the public key to verify with (cannot be NULL)
  */
 SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_schnorr_verify(
   const secp256k1_context* ctx,
   const unsigned char *sig64,
   const unsigned char *msg32,
   const secp256k1_pubkey *pubkey
 ) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(4);
 
 /**
  * Create a signature using a custom EC-Schnorr-SHA256 construction. It
  * produces non-malleable 64-byte signatures which support batch validation,
  * and multiparty signing.
  * Returns: 1: signature created
  *          0: the nonce generation function failed, or the private key was
  *             invalid.
  * Args:    ctx:    pointer to a context object, initialized for signing
  *                  (cannot be NULL)
  * Out:     sig64:  pointer to a 64-byte array where the signature will be
  *                  placed (cannot be NULL)
  * In:      msg32:  the 32-byte message hash being signed (cannot be NULL)
  *          seckey: pointer to a 32-byte secret key (cannot be NULL)
  *          noncefp:pointer to a nonce generation function. If NULL,
  *                  secp256k1_nonce_function_default is used
  *          ndata:  pointer to arbitrary data used by the nonce generation
  *                  function (can be NULL)
  */
 SECP256K1_API int secp256k1_schnorr_sign(
   const secp256k1_context *ctx,
   unsigned char *sig64,
   const unsigned char *msg32,
   const unsigned char *seckey,
   secp256k1_nonce_function noncefp,
   const void *ndata
-) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(4) SECP256K1_ARG_NONNULL(5);
+) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(4);
 
 # ifdef __cplusplus
 }
 # endif
 
 #endif