diff --git a/Makefile b/Makefile
index dab6a9c..5fde74d 100644
--- a/Makefile
+++ b/Makefile
@@ -50,8 +50,8 @@
        helper.o tftp.o log.o conntrack.o dhcp6.o rfc3315.o \
        dhcp-common.o outpacket.o radv.o
 
-HDRS = dnsmasq.h config.h dhcp_protocol.h dhcp6_protocol.h \
-       dns_protocol.h radv_protocol.h
+HDRS = dnsmasq.h config.h dhcp-protocol.h dhcp6-protocol.h \
+       dns-protocol.h radv-protocol.h
 
 
 all : $(BUILDDIR)