--- a/app-admin/testdisk/testdisk-6.12.ebuild	2011-07-08 11:31:02.000000000 +0100
+++ b/app-admin/testdisk/testdisk-6.12.ebuild	2011-07-14 12:46:00.000000000 +0100
@@ -46,8 +46,8 @@ src_configure() {
 	econf ${myconf} || die
 
 	# perform safety checks for NTFS and REISERFS
-	if use ntfs && egrep -q 'undef HAVE_LIBNTFS\>' "${S}"/config.h ; then
-		die "Failed to find NTFS library."
+	if use ntfs && ! egrep -q '^#define HAVE_LIBNTFS(3G)? 1$' "${S}"/config.h ; then
+		die "Failed to find either NTFS or NTFS-3G library."
 	fi
 	if use reiserfs && egrep -q 'undef HAVE_LIBREISERFS\>' "${S}"/config.h ; then
 		die "Failed to find reiserfs library."