diff --git a/SysBuild/network/firefox b/SysBuild/network/firefox
index 27d0bf6..d88ddc0 100644
--- a/SysBuild/network/firefox
+++ b/SysBuild/network/firefox
@@ -74,6 +74,8 @@ SRCDIR=mozilla
 
 premk() {
 	mkdir ../build-firefox
+	cp security/coreconf/Linux2.6.mk security/coreconf/Linux3.0.mk
+	cp security/coreconf/Linux2.6.mk security/coreconf/Linux3.1.mk
 	cd ../build-firefox
 }