diff --git a/Makefile b/Makefile
index 3dfbfcd..1d7a212 100644
--- a/Makefile
+++ b/Makefile
@@ -15,5 +15,11 @@ myexpand: myexpand.o
 %.o: %.c
 	$(CC) $(CFLAGS) $^
 
+.PHONY docs: Doxyfile myexpand.c
+	doxygen Doxyfile
+
+.PHONY docs_clean:
+	rm -rf html
+
 .PHONY clean:
 	rm -f myexpand.o myexpand