--- Zarith-release-1.9.1/configure.orig	2019-08-28 16:17:04.000000000 +0200
+++ Zarith-release-1.9.1/configure	2019-12-28 15:42:01.220520989 +0100
@@ -323,7 +323,11 @@
             arch='x86_64'
         fi
         ;;
-    i486-*linux-gnu|i686-*linux-gnu|i486-kfreebsd-gnu)
+    x86_64-*linux-gnux32)
+        ccdef="-DZ_ELF -DZ_DOT_LABEL_PREFIX $ccdef"
+        arch='x86_64'
+        ;;
+    i[456]86-*linux-gnu|iathlon-*linux-gnu|i486-kfreebsd-gnu)
         ccdef="-DZ_ELF -DZ_DOT_LABEL_PREFIX $ccdef"
         arch='i686';;
     i686-*cygwin)