-## should check for 1.8.2 ?
-STEPMAKE_GUILE_DEVEL(REQUIRED, 1.8.0)
-
+# check for 2 typedefs added in Guile 1.9
+save_CXXFLAGS="$CXXFLAGS"
+CXXFLAGS="$GUILE_CFLAGS $CXXFLAGS"
+AC_CHECK_TYPES([scm_t_hash_fold_fn, scm_t_hash_handle_fn],
+ [AC_DEFINE(HAVE_GUILE_HASH_FUNC)], [],
+ [#include <libguile.h>])
+CXXFLAGS="$save_CXXFLAGS"