diff -r bec27eb6f72c tools/blktap2/drivers/check_gcrypt
--- a/tools/blktap2/drivers/check_gcrypt	Sat Nov 14 10:32:59 2009 +0000
+++ b/tools/blktap2/drivers/check_gcrypt	Mon Nov 16 09:30:44 2009 +0100
@@ -4,8 +4,7 @@
 #include <gcrypt.h>
 int main(void) 
 {
-    char dummy[14];
-    MD5("DUMMY", 5, dummy);
+    gcry_md_hash_buffer(GCRY_MD_MD5, NULL, NULL, 0);
     return 0; 
 }
 EOF