--- src/tools/gtkada-config.in~	2010-09-25 16:58:19.000000000 +0200
+++ src/tools/gtkada-config.in	2010-09-25 16:58:19.000000000 +0200
@@ -1,11 +1,20 @@
 #!/bin/sh
 # @configure_input@
 
+case `uname --hardware-platform` in
+   x86_64|ppc64|s390x|sparc64|alpha|ia64)
+      lib=lib64
+      ;;
+   *)
+      lib=lib
+      ;;
+esac
+
 prefix=@prefix@
 exec_prefix=@exec_prefix@
 bindir=@bindir@
 includedir=@includedir@/gtkada
-libdir=@libdir@
+libdir=${prefix}/${lib}
 libdir_static=${libdir}/@libsubdir_static@
 libdir_shared=${libdir}/@libsubdir_shared@
 alidir_static=${libdir}/@alisubdir_static@