diff --git a/src/configure.in b/src/configure.in
index cf69350..ac6eb45 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -1692,9 +1692,9 @@
       if test "X$rubyhdrdir" != "X"; then
 	AC_MSG_RESULT($rubyhdrdir)
 	RUBY_CFLAGS="-I$rubyhdrdir"
-        rubyarch=`$vi_cv_path_ruby -r rbconfig -e "print $ruby_rbconfig::CONFIG[['arch']]"`
-        if test -d "$rubyhdrdir/$rubyarch"; then
-          RUBY_CFLAGS="$RUBY_CFLAGS -I$rubyhdrdir/$rubyarch"
+        rubyarchdir=`$vi_cv_path_ruby -r rbconfig -e "print ($ruby_rbconfig::CONFIG.has_key? 'rubyarchhdrdir') ? $ruby_rbconfig::CONFIG[['rubyarchhdrdir']] : '$rubyhdrdir/'+$ruby_rbconfig::CONFIG[['arch']]"`
+        if test -d "$rubyarchdir"; then
+          RUBY_CFLAGS="$RUBY_CFLAGS -I$rubyarchdir"
         fi
         rubyversion=`$vi_cv_path_ruby -r rbconfig -e "print $ruby_rbconfig::CONFIG[['ruby_version']].gsub(/\./, '')[[0,2]]"`
 	if test "X$rubyversion" = "X"; then