Index: /trunk/src/VBox/Runtime/tools/RTSignTool.cpp
===================================================================
--- /trunk/src/VBox/Runtime/tools/RTSignTool.cpp	(revision 64857)
+++ /trunk/src/VBox/Runtime/tools/RTSignTool.cpp	(revision 64858)
@@ -663,5 +663,5 @@
     RTERRINFOSTATIC     ErrInfo;
     RTASN1CURSORPRIMARY PrimaryCursor;
-    RTAsn1CursorInitPrimary(&PrimaryCursor, pThis->pbBuf, pThis->cbBuf, RTErrInfoInitStatic(&ErrInfo),
+    RTAsn1CursorInitPrimary(&PrimaryCursor, pThis->pbBuf, (uint32_t)pThis->cbBuf, RTErrInfoInitStatic(&ErrInfo),
                             &g_RTAsn1DefaultAllocator, 0, "WinCert");