diff --git a/kernel-builder/build_kernel b/kernel-builder/build_kernel
index 088e7cb..bd8c667 100755
--- a/kernel-builder/build_kernel
+++ b/kernel-builder/build_kernel
@@ -54,7 +54,7 @@ install_kernel(){
 
 	# get the kernel source
 	if [[ "$VERSION" == *-rc* ]]; then
-		[ -d /usr/src/linux-${VERSION} ] || curl -sSL "https://git.kernel.org/torvalds/t/linux-${VERSION}.tar.gz" | tar -v -C /usr/src -x
+		[ -d /usr/src/linux-${VERSION} ] || curl -sSL "https://git.kernel.org/torvalds/t/linux-${VERSION}.tar.gz" | tar -v -C /usr/src -xz
 
 		MAJOR_MINOR_VERSION="${MAJOR_VERSION}.x-rcN"
 	else