diff --git a/src/vmaware.hpp b/src/vmaware.hpp
index d1c6d6e..163bbd7 100644
--- a/src/vmaware.hpp
+++ b/src/vmaware.hpp
@@ -2723,7 +2723,7 @@ struct VM {
         #else
             HKEY hOpen;
             char *szBuff;
-            int iBuffSize;
+            unsigned int iBuffSize;
             HANDLE hMod;
             LONG nRes;
 
@@ -2742,7 +2742,7 @@ struct VM {
             nRes = RegOpenKeyEx(HKEY_LOCAL_MACHINE, "Software\\Microsoft\\Windows\\CurrentVersion", 0L, KEY_QUERY_VALUE, &hOpen);
             if (nRes == ERROR_SUCCESS) {
                 iBuffSize = sizeof(szBuff);
-                nRes = RegQueryValueEx(hOpen, "ProductId", NULL, NULL, (unsigned char*)szBuff, static_cast<LPDWORD>(iBuffSize));
+                nRes = RegQueryValueEx(hOpen, "ProductId", NULL, NULL, (unsigned char*)szBuff, reinterpret_cast<LPDWORD>(iBuffSize));
                 if (nRes == ERROR_SUCCESS) {
                     if (strcmp(szBuff, "55274-640-2673064-23950") == 0) { // joebox
                         return add(JOEBOX);