X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/7bcc9eb973ea1aba395d6020a9215edf62251aff..4f1cf94b942cbf62616a8a1a066b1a13ff6af792:/src/common/filefn.cpp

diff --git a/src/common/filefn.cpp b/src/common/filefn.cpp
index 5786749e83..c2614443c7 100644
--- a/src/common/filefn.cpp
+++ b/src/common/filefn.cpp
@@ -1646,7 +1646,7 @@ bool wxSetWorkingDirectory(const wxString& d)
 #if defined(__OS2__)
     if (d[1] == ':')
     {
-        ::DosSetDefaultDisk(1 + wxToupper(d[0]) - _T('A'));
+        ::DosSetDefaultDisk(wxToupper(d[0]) - _T('A') + 1);
 	// do not call DosSetCurrentDir when just changing drive,
 	// since it requires e.g. "d:." instead of "d:"!
 	if (d.length() == 2)