--- Sources/KrystalDrop/Tools/direct.cpp
+++ Sources/KrystalDrop/Tools/direct.cpp
@@ -77,7 +77,7 @@
   assert (f);
   assert (*f!= 0);
 
-  p= strrchr (f, ACC_FNSPLITCHAR);
+  p= strrchr ((char *)f, ACC_FNSPLITCHAR);
   if (p!= NULL)
   { if (*p== 0)      return NULL; // this line should be useless, according to strrchr manpage
     if (*(p+ 1)== 0) return NULL;