diff -urN synaptics-0.14.6_p20070706.orig/Makefile synaptics-0.14.6_p20070706/Makefile
--- synaptics-0.14.6_p20070706.orig/Makefile	2008-08-29 09:34:11.000000000 +0200
+++ synaptics-0.14.6_p20070706/Makefile	2008-08-29 10:40:29.000000000 +0200
@@ -34,10 +34,9 @@
   LDCOMBINEFLAGS = -shared -lc
   PICFLAG = $(call check_gcc,-fPIC,)
   X_INCLUDES_ROOT = $(INSTALLED_X)
-  SDKDIR = $(shell pkg-config xorg-server --variable=sdkdir)
   ALLINCLUDES = -I. -I$(INSTALLED_X)/include/X11 \
 		-I$(INSTALLED_X)/include/X11/extensions \
-		-I$(SDKDIR)
+		`pkg-config xorg-server --cflags`
 else
   INSTALLED_X = /usr/X11R6
   INPUT_MODULE_DIR = $(DESTDIR)/$(INSTALLED_X)/$(LIBDIR)/modules/input