diff --git a/Makefile b/Makefile
index 3e5612a..e079613 100644
--- a/Makefile
+++ b/Makefile
@@ -35,7 +35,7 @@ endif
 all: help
 
 MIRROR := ftp.kernel.org
-SRC_BASEURL := http://${MIRROR}/pub/linux/kernel/v$(shell echo $(VERSION) | sed 's/^\(2\.[0-9]*\).*/\1/;s/^3\..*/3.x/')
+SRC_BASEURL := http://${MIRROR}/pub/linux/kernel/v$(shell echo $(VERSION) | sed 's/^\(2\.[0-9]*\).*/\1/;s/^3\..*/3.x/;s/^4\..*/4.x/')
 SRC_FILE := linux-${VERSION}.tar.xz
 ifeq ($(BUILD_FLAVOR),pvops)
 SIGN_FILE := linux-${VERSION}.tar.sign