--- synthv1-0.7.1/configure.ac.orig	2015-11-20 06:27:01.366916885 +0100
+++ synthv1-0.7.1/configure.ac	2015-11-20 07:02:02.997034459 +0100
@@ -187,7 +187,7 @@ ac_arch=`uname -m`
 # Check for install paths and alternatives...
 ac_libdirs="lib"
 
-if test "x$ac_arch" = "xx86_64"; then
+if test -d $X/lib64; then
    ac_libdirs="$ac_libdirs lib64"
 fi