--- a/Makefile.am
+++ b/Makefile.am
@@ -7,7 +7,7 @@
 matchbox_desktop_CFLAGS = \
 	-Wall
 matchbox_desktop_LDADD = \
-	$(GTK_LIBS) $(SN_LIBS)
+	$(GTK_LIBS) $(SN_LIBS) -lX11
 
 matchbox_desktop_SOURCES = \
 	taku-tile.h taku-tile.c \
--- a/Makefile.in
+++ b/Makefile.in
@@ -183,7 +183,7 @@
 	-Wall
 
 matchbox_desktop_LDADD = \
-	$(GTK_LIBS) $(SN_LIBS)
+	$(GTK_LIBS) $(SN_LIBS) -lX11
 
 matchbox_desktop_SOURCES = \
 	taku-tile.h taku-tile.c \