diff --git a/Makefile b/Makefile
index 058061fabdd6b424aea206b4d73f4fc1af4b04bc..6412c7ee425d8f80e1cdb64da0aa1a9160445250 100644
--- a/Makefile
+++ b/Makefile
@@ -25,7 +25,7 @@ docs.pdf: images/wide.jpg $(ALL_FILES)
 resources.pdf: $(ALL_FILES)
 	$(RUN) resources.tex
 	$(CP) $(DROSS)/resources.pdf resources.pdf
-rules.pdf: images/wide.jpg $(ALL_FILES)
+rules.pdf: images/wide.jpg $(wildcard rules/*.tex) $(ALL_FILES)
 	$(RUN) rules.tex
 	$(RUN) rules.tex
 	$(CP) $(DROSS)/rules.pdf rules.pdf