diff --git a/Makefile.am b/Makefile.am
index 8ba74921..12ef53de 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -2,7 +2,7 @@ bin_PROGRAMS = shairport
 shairport_SOURCES = shairport.c rtsp.c mdns.c mdns_external.c mdns_tinysvcmdns.c common.c rtp.c player.c alac.c audio.c audio_dummy.c audio_pipe.c tinysvcmdns.c mdns_avahi.c
 
 install-exec-hook:
-	cp scripts/shairport /etc/init.d/
+	[ -f /etc/init.d/shairport ] || cp scripts/shairport /etc/init.d/
 	update-rc.d shairport defaults 90 10
 
 if USE_ALSA