diff -dur mine-0.24/md5sum.c mine-0.24-p/md5sum.c
--- mine-0.24/md5sum.c	2005-08-09 12:57:29.000000000 +0200
+++ mine-0.24-p/md5sum.c	2006-03-24 22:00:15.000000000 +0100
@@ -20,6 +20,7 @@
 #include <stdio.h>
 #include <dirent.h>
 #include <string.h>
+#include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>
 
@@ -37,8 +38,14 @@
 	struct stat statbuf;
 
 	snprintf(realfilename, 1024, "%s/%s", root, filename);
-	return (stat(realfilename, &statbuf) != 0 || S_ISFIFO(statbuf.st_mode))
-		? "" : md5_file(realfilename);
+	if (stat(realfilename, &statbuf) != 0)
+		return "";
+	else if ( S_ISCHR(statbuf.st_mode) || S_ISBLK(statbuf.st_mode)
+		|| S_ISLNK(statbuf.st_mode) || S_ISSOCK(statbuf.st_mode)
+		|| S_ISFIFO(statbuf.st_mode) )
+		return "X";
+	else
+		return md5_file(realfilename);
 }
 
 /* Returns 1 if file is duplicate, 2 if file is modified. */