diff --git a/oem/ibm/libpldmresponder/file_io_type_lid.hpp b/oem/ibm/libpldmresponder/file_io_type_lid.hpp
index d3a48a5..3a3332a 100644
--- a/oem/ibm/libpldmresponder/file_io_type_lid.hpp
+++ b/oem/ibm/libpldmresponder/file_io_type_lid.hpp
@@ -49,6 +49,11 @@
         return readFile(lidPath, offset, length, response);
     }
 
+    virtual int fileAck(uint8_t /*fileStatus*/)
+    {
+        return PLDM_ERROR_UNSUPPORTED_PLDM_CMD;
+    }
+
     /** @brief LidHandler destructor
      */
     ~LidHandler()