$OpenBSD$
--- Makefile.orig	Thu Nov 20 20:05:57 2014
+++ Makefile	Thu Nov 20 20:06:27 2014
@@ -5,7 +5,8 @@ CC      ?= gcc
 LIBS     = -lm -lxcb -lxcb-keysyms
 CFLAGS  += -std=c99 -pedantic -Wall -Wextra -I$(PREFIX)/include
 CFLAGS  += -D_POSIX_C_SOURCE=200112L -DVERSION=\"$(VERSION)\"
-LDFLAGS += -L$(PREFIX)/lib
+CFLAGS  += -I$(X11BASE)/include
+LDFLAGS += -L$(PREFIX)/lib -L$(X11BASE)/lib
 
 PREFIX    ?= /usr/local
 BINPREFIX  = $(PREFIX)/bin