diff --git a/Software/src/webui.cpp b/Software/src/webui.cpp
index 1718194..9ea05a5 100644
--- a/Software/src/webui.cpp
+++ b/Software/src/webui.cpp
@@ -9,7 +9,7 @@ void WebserverPOST_Callback(AsyncWebServerRequest *request);
 void WebserverNotFound_Callback(AsyncWebServerRequest *request);
 void Webserver_Callback(AsyncWebServerRequest *request);
 void WebserverFirmwareUpdate_Callback(AsyncWebServerRequest *request, const String &filename, size_t index, uint8_t *data, size_t len, bool final);
-uint32_t GetFlashVersion();
+void GetFlashVersion(char *buff, size_t buff_size);
 
 void initWebUI()
 {