diff --git a/include/zephyr/bluetooth/gatt.h b/include/zephyr/bluetooth/gatt.h
index b5c355fad21..2cbe96a7285 100644
--- a/include/zephyr/bluetooth/gatt.h
+++ b/include/zephyr/bluetooth/gatt.h
@@ -1896,6 +1896,11 @@ struct bt_gatt_subscribe_params {
  *  Allow a pending request to resolve before retrying, or call this function
  *  outside the BT RX thread to get blocking behavior. Queue size is controlled
  *  by @kconfig{CONFIG_BT_ATT_TX_COUNT}.
+ *
+ *  @retval -EALREADY if there already exist a subscription using the @p params.
+ *
+ *  @retval -EBUSY if @p params.ccc_handle is 0 and @kconfig{CONFIG_BT_GATT_AUTO_DISCOVER_CCC} is
+ *  enabled and discovery for the @p params is already in progress.
  */
 int bt_gatt_subscribe(struct bt_conn *conn,
 		      struct bt_gatt_subscribe_params *params);
diff --git a/subsys/bluetooth/host/gatt.c b/subsys/bluetooth/host/gatt.c
index 451c3d29f7f..eda7d2dff26 100644
--- a/subsys/bluetooth/host/gatt.c
+++ b/subsys/bluetooth/host/gatt.c
@@ -5294,6 +5294,13 @@ int bt_gatt_subscribe(struct bt_conn *conn,
 		return -ENOMEM;
 	}
 
+#if defined(CONFIG_BT_GATT_AUTO_DISCOVER_CCC)
+	if (params->disc_params != NULL && params->disc_params->func == gatt_ccc_discover_cb) {
+		/* Already in progress */
+		return -EBUSY;
+	}
+#endif
+
 	/* Lookup existing subscriptions */
 	SYS_SLIST_FOR_EACH_CONTAINER(&sub->list, tmp, node) {
 		/* Fail if entry already exists */