--- acinclude.m4.orig	2007-11-14 23:40:12.000000000 -0300
+++ acinclude.m4	2007-11-15 12:22:48.000000000 -0300
@@ -44,11 +44,17 @@ AC_DEFUN([AC_INIT_BLUEZ], [
 
 		prefix="${ac_default_prefix}"
 	fi
-
-	if (test "${libdir}" = '${exec_prefix}/lib'); then
-		libdir="${prefix}/lib"
+	
+	dnl if lib64 is present then we use it
+	if (test -d "${prefix}/lib64" ); then
+	    libdir="${prefix}/lib64"
 	fi
-
+	
+	dnl and then only if ${libdir} keeps beeing empty we use lib
+	if ( test -z "${libdir}" ) ; then
+	    libdir="${prefix}/lib"
+	fi
+	
 	if (test "$sysconfdir" = '${prefix}/etc'); then
 		configdir="${prefix}/etc/bluetooth"
 	else