+++ src/app/virtualbox/src/VBox/Runtime/r3/posix/utf8-posix.cpp
@@ -324,11 +324,7 @@
             const void *pvInputLeft = pvInput;
             void       *pvOutputLeft = pvOutput;
             size_t      cchNonRev;
-#if defined(RT_OS_LINUX) || defined(RT_OS_HAIKU) || defined(RT_OS_SOLARIS) || (defined(RT_OS_DARWIN) && defined(_DARWIN_FEATURE_UNIX_CONFORMANCE)) /* there are different opinions about the constness of the input buffer. */
             cchNonRev = iconv(icHandle, (char **)&pvInputLeft, &cbInLeft, (char **)&pvOutputLeft, &cbOutLeft);
-#else
-            cchNonRev = iconv(icHandle, (const char **)&pvInputLeft, &cbInLeft, (char **)&pvOutputLeft, &cbOutLeft);
-#endif
             if (cchNonRev != (size_t)-1)
             {
                 if (!cbInLeft)