diff --git a/Makefile b/Makefile
index 25526672..4f0e4731 100644
--- a/Makefile
+++ b/Makefile
@@ -128,4 +128,10 @@ devel:
 		--enable-bigarray --enable-thread --enable-advanced
 	make all
 
+watch:
+	while find src/ -print0 | xargs -0 inotifywait -e delete_self -e modify ; do \
+		echo "============ at `date` ==========" ; \
+		make ; \
+	done
+
 .PHONY: examples push_doc tags qtest-gen qtest-clean devel update_next_tag