1 files changed, 1 insertions, 1 deletions

diff --git a/src/mint/taler-mint-httpd_keys.c b/src/mint/taler-mint-httpd_keys.c
index 28924baef..359357da9 100644
--- a/src/mint/taler-mint-httpd_keys.c
+++ b/src/mint/taler-mint-httpd_keys.c
@@ -379,7 +379,7 @@ TALER_MINT_get_denom_key (const struct MintKeyState *key_state,
  */
 int
 TALER_MINT_test_coin_valid (const struct MintKeyState *key_state,
-                            struct TALER_CoinPublicInfo *coin_public_info)
+                            const struct TALER_CoinPublicInfo *coin_public_info)
 {
   struct TALER_MINT_DenomKeyIssuePriv *dki;
   struct GNUNET_HashCode c_hash;