diff -Naur iscan-2.20.0_old/lib/basic-imgstream.cc iscan-2.20.0/lib/basic-imgstream.cc
--- iscan-2.20.0_old/lib/basic-imgstream.cc	2009-06-08 04:39:33.000000000 +0200
+++ iscan-2.20.0/lib/basic-imgstream.cc	2009-07-07 21:03:50.584465554 +0200
@@ -117,7 +117,7 @@
   }
 
   // forward declarations
-  static int reversionsort (const void*, const void*);
+  static int reversionsort (const dirent**, const dirent**);
   int selector (const dirent *);
 
   //!
@@ -270,7 +270,7 @@
 
   //! The C library's versionsort() function in reverse.
   static int
-  reversionsort (const void *a, const void *b)
+  reversionsort (const dirent **a, const dirent **b)
   {
     return versionsort (b, a);
   }