--- a/guile/src/Makefile.am
+++ b/guile/src/Makefile.am
@@ -124,4 +124,7 @@
 
 .c.x: $(BUILT_SOURCES)
 	$(guile_snarf) -o $@ $< $(snarfcppopts)
+core.x: core.c enums.h enum-map.i.c priorities.i.c smobs.h smob-types.i.c
+errors.x: errors.c enums.h
+extra.x: extra.c enums.h extra-enums.h extra-enum-map.i.c extra-smobs.h extra-smob-types.i.c smobs.h