diff --git a/include/strings.cpp b/include/strings.cpp
index f28651933..f8f776fae 100755
--- a/include/strings.cpp
+++ b/include/strings.cpp
@@ -650,6 +650,7 @@ const TFilename& TFilename::tempdir()
 
     int res = 0;
     
+    _tempdir.lower();
     if (!fexist(_tempdir))
     {  
 #if XVT_OS==XVT_OS_SCOUNIX
@@ -669,13 +670,13 @@ const TFilename& TFilename::tempdir()
 #else
       _tempdir << '\\' << user;
 #endif      
-      lower();
+      _tempdir.lower();
       if (!fexist(_tempdir))
       {  
 #if XVT_OS==XVT_OS_SCOUNIX
-        res = mkdir(_str, 0777);
+        res = mkdir(_tempdir, 0777);
 #else
-        res = mkdir(_str);
+        res = mkdir(_tempdir);
 #endif       
       }
     }