Index: /trunk/src/libs/xpcom18a4/python/src/VariantUtils.cpp
===================================================================
--- /trunk/src/libs/xpcom18a4/python/src/VariantUtils.cpp	(revision 38909)
+++ /trunk/src/libs/xpcom18a4/python/src/VariantUtils.cpp	(revision 38910)
@@ -1116,5 +1116,5 @@
 	if (PySequence_Length(m_pyparams) != total_params_needed) {
 #ifdef VBOX
-                PyErr_Format(PyExc_ValueError, "The type descriptions indicate %d args are needed, but %u were provided",
+                PyErr_Format(PyExc_ValueError, "The type descriptions indicate %d args are needed, but %ld were provided",
 			total_params_needed, PySequence_Length(m_pyparams));
 #else