diff --git a/wmswallow/Makefile b/wmswallow/Makefile
index b75aa24..84e2e62 100644
--- a/wmswallow/Makefile
+++ b/wmswallow/Makefile
@@ -5,7 +5,7 @@ RM=rm -f
 X=/usr/X11R6
 INCLUDES=-I$(X)/include
 LIBPATHS=-L${X}/lib
-LIBS=-lXext
+LIBS=-lXext -lX11
 PROG=wmswallow
 OBJS=wmswallow.o
 SH=/bin/sh