-GTKMATHVIEW_BONOBO_IDL_INTERFACE_VERSION=`echo $VERSION | awk -F. '{ printf "%d.%d", $1, $2 }'`
-AC_SUBST(GTKMATHVIEW_BONOBO_IDL_INTERFACE_VERSION)
+GTKMATHVIEW_API_VERSION="1.0"
+AC_SUBST(GTKMATHVIEW_API_VERSION)
+AC_DEFINE_UNQUOTED(MATH_VIEW_API_VERSION, "$GTKMATHVIEW_API_VERSION", [Version number of the API implemented])