diff --git a/Makefile b/Makefile
index 6fb3aa6..3583001 100644
--- a/Makefile
+++ b/Makefile
@@ -28,13 +28,14 @@ install:
 	install -m 644 doc/snac.8 $(PREFIX_MAN)/man8/snac.8
 
 activitypub.o: activitypub.c xs.h xs_encdec.h xs_json.h xs_curl.h \
- xs_mime.h xs_openssl.h xs_regex.h xs_time.h snac.h
-data.o: data.c xs.h xs_io.h xs_json.h xs_openssl.h xs_glob.h snac.h
+ xs_mime.h xs_openssl.h xs_regex.h xs_time.h xs_set.h snac.h
+data.o: data.c xs.h xs_io.h xs_json.h xs_openssl.h xs_glob.h xs_set.h \
+ snac.h
 format.o: format.c xs.h xs_regex.h snac.h
 html.o: html.c xs.h xs_io.h xs_encdec.h xs_json.h xs_regex.h xs_set.h \
  xs_openssl.h xs_time.h xs_mime.h snac.h
 http.o: http.c xs.h xs_io.h xs_encdec.h xs_openssl.h xs_curl.h xs_time.h \
- snac.h
+ xs_json.h snac.h
 httpd.o: httpd.c xs.h xs_io.h xs_encdec.h xs_json.h xs_socket.h \
  xs_httpd.h xs_mime.h snac.h
 main.o: main.c xs.h xs_io.h xs_encdec.h xs_json.h snac.h