--- a/daemon/Makefile.am
+++ b/daemon/Makefile.am
@@ -13,6 +13,7 @@
 	@CURL_CFLAGS@ \
 	@BPWRAPPER_CFLAGS@ \
 	@GNUTLS_CFLAGS@ \
+	@WS_CFLAGS@ \
 	-Wall

 if MACOS