--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -2,3 +2,4 @@
 libKXL_la_SOURCES = KXLmisc.c KXLsound.c KXLjoystick.c KXLvisual.c KXLimage.c
 include_HEADERS = KXL.h
 libKXL_la_LDFLAGS = -release $(VERSION)
+libKXL_la_LIBADD = -lX11