diff --git a/Makefile b/Makefile
index 22fbf41..ea42ebb 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,6 @@
-all:
+zmq.so: zmq.c
 	gcc -O2 -fpic -c -I /usr/include/lua5.1/ -o zmq.o zmq.c
 	gcc -O `pkg-config --libs --cflags libzmq` -shared -fpic -o zmq.so zmq.o
+
+clean:
+	rm zmq.so zmq.o