diff --git a/linux/payload/PlocMpsocHandler.cpp b/linux/payload/PlocMpsocHandler.cpp
index 78093740..25996b1a 100644
--- a/linux/payload/PlocMpsocHandler.cpp
+++ b/linux/payload/PlocMpsocHandler.cpp
@@ -1181,6 +1181,10 @@ size_t PlocMPSoCHandler::getNextReplyLength(DeviceCommandId_t commandId) {
         // report is not fixed
         replyLen = mpsoc::SP_MAX_SIZE;
         break;
+      case mpsoc::TM_FLASH_DIRECTORY_CONTENT:
+        // I think the reply size is not fixed either.
+        replyLen = mpsoc::SP_MAX_SIZE;
+        break;
       default: {
         replyLen = iter->second.replyLen;
         break;