diff -up mozilla-1.9.2/xulrunner/installer/mozilla-plugin.pc.in.old mozilla-1.9.2/xulrunner/installer/mozilla-plugin.pc.in
--- mozilla-1.9.2/xulrunner/installer/mozilla-plugin.pc.in.old	2009-11-25 05:13:11.000000000 +0100
+++ mozilla-1.9.2/xulrunner/installer/mozilla-plugin.pc.in	2009-12-03 10:14:41.000000000 +0100
@@ -5,5 +5,5 @@ includedir=%includedir%
 Name: Mozilla Plug-In API
 Description: Mozilla Plug-In API
 Version: %MOZILLA_VERSION%
-Cflags: -I${includedir}/stable -DXP_UNIX %ojidef%
+Cflags: -I${includedir} -DXP_UNIX %ojidef%