diff --git a/hotp/host/Makefile b/hotp/host/Makefile
index 54d879e..cb7fd19 100644
--- a/hotp/host/Makefile
+++ b/hotp/host/Makefile
@@ -23,3 +23,6 @@
 .PHONY: clean
 clean:
 	rm -f $(OBJS) $(BINARY)
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c $< -o $@