diff --git a/src/modules/musig/session_impl.h b/src/modules/musig/session_impl.h
index 1251b378..dde38085 100644
--- a/src/modules/musig/session_impl.h
+++ b/src/modules/musig/session_impl.h
@@ -392,7 +392,7 @@ static void secp256k1_nonce_function_musig(secp256k1_scalar *k, const unsigned c
     secp256k1_sha256_clear(&sha);
 }
 
-int secp256k1_musig_nonce_gen_internal(const secp256k1_context* ctx, secp256k1_musig_secnonce *secnonce, secp256k1_musig_pubnonce *pubnonce, const unsigned char *input_nonce, const unsigned char *seckey, const secp256k1_pubkey *pubkey, const unsigned char *msg32, const secp256k1_musig_keyagg_cache *keyagg_cache, const unsigned char *extra_input32) {
+static int secp256k1_musig_nonce_gen_internal(const secp256k1_context* ctx, secp256k1_musig_secnonce *secnonce, secp256k1_musig_pubnonce *pubnonce, const unsigned char *input_nonce, const unsigned char *seckey, const secp256k1_pubkey *pubkey, const unsigned char *msg32, const secp256k1_musig_keyagg_cache *keyagg_cache, const unsigned char *extra_input32) {
     secp256k1_scalar k[2];
     secp256k1_ge nonce_pts[2];
     int i;