diff -urN liferea-1.4.20/src/mozilla/Makefile.am liferea-1.4.20.new/src/mozilla/Makefile.am
--- liferea-1.4.20/src/mozilla/Makefile.am	2007-07-23 19:56:53.000000000 +0200
+++ liferea-1.4.20.new/src/mozilla/Makefile.am	2008-10-06 16:36:16.000000000 +0200
@@ -37,14 +37,22 @@
 
 ## the XulRunner support module
 
+XULRUNNER_EXTRA_CFLAGS = \
+	-I/usr/include/xulrunner \
+	-I/usr/include/xulrunner/dom \
+	-I/usr/include/xulrunner/gtkembedmoz \
+	-I/usr/include/xulrunner/necko \
+	-I/usr/include/xulrunner/webbrwsr \
+	-I/usr/include/xulrunner/xpcom
+
 liblihtmlx_la_SOURCES = \
 	mozembed.c mozembed.h \
 	mozsupport.cpp mozsupport.h \
 	xulrunner.c
 
 liblihtmlx_la_LIBADD = $(PACKAGE_LIBS) $(XULRUNNER_LIBS) $(INTLLIBS)
-liblihtmlx_la_CFLAGS = $(XULRUNNER_CFLAGS) $(PACKAGE_CFLAGS)  -DXULRUNNER_HOME=\""$(XULRUNNER_HOME)\""
-liblihtmlx_la_CXXFLAGS = $(XULRUNNER_CFLAGS) $(PACKAGE_CFLAGS)
+liblihtmlx_la_CFLAGS = $(XULRUNNER_CFLAGS) $(XULRUNNER_EXTRA_CFLAGS) $(PACKAGE_CFLAGS)  -DXULRUNNER_HOME=\""$(XULRUNNER_HOME)\""
+liblihtmlx_la_CXXFLAGS = $(XULRUNNER_CFLAGS) $(XULRUNNER_EXTRA_CFLAGS) $(PACKAGE_CFLAGS)
 
 if PLATFORM_WIN32