--- devilspie-0.22.old/src/Makefile.in
+++ devilspie-0.22/src/Makefile.in
@@ -135,7 +135,7 @@
 INTLTOOL_XML_RULE = @INTLTOOL_XML_RULE@
 LDFLAGS = @LDFLAGS@
 LIBOBJS = @LIBOBJS@
-LIBS = @LIBS@
+LIBS = @LIBS@ -lX11
 LTLIBOBJS = @LTLIBOBJS@
 MAKEINFO = @MAKEINFO@
 MKDIR_P = @MKDIR_P@