diff --git a/src/guacd/Makefile.am b/src/guacd/Makefile.am
index 7ddad6f6..ed4017a8 100644
--- a/src/guacd/Makefile.am
+++ b/src/guacd/Makefile.am
@@ -46,6 +46,7 @@ man_MANS = man/guacd.8
 noinst_HEADERS = client.h log.h
 guacd_SOURCES  = daemon.c client.c log.c
 guacd_LDADD    = @LIBGUAC_LTLIB@
+guacd_LDFLAGS  = @PTHREAD_LIBS@
 
 EXTRA_DIST = init.d/guacd.in man/guacd.8
 CLEANFILES = $(init_SCRIPTS)