diff --git a/waitforx/Makefile.am b/waitforx/Makefile.am
index 5b96f661..d4ddaa45 100644
--- a/waitforx/Makefile.am
+++ b/waitforx/Makefile.am
@@ -1,7 +1,7 @@
 pkglibexec_PROGRAMS = \
   waitforx
 
-AM_LDFLAGS = -lX11 -lXrandr
+AM_LDFLAGS = $(X_LIBS) -lX11 -lXrandr
 
 AM_CPPFLAGS = \
   -I$(top_srcdir)/sesman/sesexec \