diff --git a/doc/releases/release-notes-2.5.rst b/doc/releases/release-notes-2.5.rst
index d08466dbc98..a6149ec08aa 100644
--- a/doc/releases/release-notes-2.5.rst
+++ b/doc/releases/release-notes-2.5.rst
@@ -107,6 +107,8 @@ Removed APIs in this release
     use bt_conn_le_create_auto() instead.
   * The deprecated BT_LE_ADV_* macros have been removed,
     use the BT_GAP_ADV_* enums instead.
+  * The deprecated bt_conn_security function has been removed,
+    use bt_conn_set_security instead.
   * The deprecated BT_SECURITY_* defines NONE, LOW, MEDIUM, HIGH, FIPS have been
     removed, use the L0, L1, L2, L3, L4 defines instead.
   * The deprecated BT_HCI_ERR_AUTHENTICATION_FAIL define has been removed,
diff --git a/include/bluetooth/conn.h b/include/bluetooth/conn.h
index 302e0b7e312..b1fc9213787 100644
--- a/include/bluetooth/conn.h
+++ b/include/bluetooth/conn.h
@@ -748,12 +748,6 @@ int bt_conn_set_security(struct bt_conn *conn, bt_security_t sec);
  */
 bt_security_t bt_conn_get_security(struct bt_conn *conn);
 
-static inline int __deprecated bt_conn_security(struct bt_conn *conn,
-						bt_security_t sec)
-{
-	return bt_conn_set_security(conn, sec);
-}
-
 /** @brief Get encryption key size.
  *
  *  This function gets encryption key size.