diff --git a/include/bluetooth/audio/csis.h b/include/bluetooth/audio/csis.h
index d609ef74089..54f60a0a186 100644
--- a/include/bluetooth/audio/csis.h
+++ b/include/bluetooth/audio/csis.h
@@ -53,9 +53,8 @@ extern "C" {
 #define BT_CSIS_ERROR_LOCK_DENIED               0x80
 #define BT_CSIS_ERROR_LOCK_RELEASE_DENIED       0x81
 #define BT_CSIS_ERROR_LOCK_INVAL_VALUE          0x82
-#define BT_CSIS_ERROR_SIRK_ACCESS_REJECTED      0x83
-#define BT_CSIS_ERROR_SIRK_OOB_ONLY             0x84
-#define BT_CSIS_ERROR_LOCK_ALREADY_GRANTED      0x85
+#define BT_CSIS_ERROR_SIRK_OOB_ONLY             0x83
+#define BT_CSIS_ERROR_LOCK_ALREADY_GRANTED      0x84
 
 #define BT_CSIS_RELEASE_VALUE                   0x01
 #define BT_CSIS_LOCK_VALUE                      0x02
diff --git a/subsys/bluetooth/audio/csis.c b/subsys/bluetooth/audio/csis.c
index 97882633fc6..9b1ed98942c 100644
--- a/subsys/bluetooth/audio/csis.c
+++ b/subsys/bluetooth/audio/csis.c
@@ -327,7 +327,7 @@ static ssize_t read_set_sirk(struct bt_conn *conn,
 			BT_HEXDUMP_DBG(enc_sirk.value, sizeof(enc_sirk.value),
 				       "Encrypted Set SIRK");
 		} else if (cb_rsp == BT_CSIS_READ_SIRK_REQ_RSP_REJECT) {
-			return BT_GATT_ERR(BT_CSIS_ERROR_SIRK_ACCESS_REJECTED);
+			return BT_GATT_ERR(BT_ATT_ERR_AUTHORIZATION);
 		} else if (cb_rsp == BT_CSIS_READ_SIRK_REQ_RSP_OOB_ONLY) {
 			return BT_GATT_ERR(BT_CSIS_ERROR_SIRK_OOB_ONLY);
 		}