diff --git a/src/mac/carbon/utils.cpp b/src/mac/carbon/utils.cpp
index 01aefde677..20171b3b4d 100644
--- a/src/mac/carbon/utils.cpp
+++ b/src/mac/carbon/utils.cpp
@@ -648,11 +648,12 @@ wxWindow* wxFindWindowAtPoint(const wxPoint& pt)
 wxString wxGetOsDescription()
 {
 #ifdef __DARWIN__
-    char data[128];
     struct utsname name;
     uname(&name);
-    sprintf(data, "Mac OS X (%s %s %s)", name.sysname, name.release, name.machine);
-    return wxString(data, wxConvUTF8);
+	return wxString::Format(_T("Mac OS X (%s %s %s)"),
+			wxString::FromAscii(name.sysname).c_str(),
+			wxString::FromAscii(name.release).c_str(),
+			wxString::FromAscii(name.machine).c_str());
 #else
 #ifdef WXWIN_OS_DESCRIPTION
     // use configure generated description if available