diff --git a/linux/Config.in b/linux/Config.in
index 148b858120..7595a4a1bb 100644
--- a/linux/Config.in
+++ b/linux/Config.in
@@ -69,7 +69,11 @@ config BR2_LINUX_KERNEL_CUSTOM_GIT_REPO_URL
 
 config BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION
 	string "Custom Git version"
+	default "HEAD"
 	depends on BR2_LINUX_KERNEL_CUSTOM_GIT
+	help
+	  Git revision to use in the format used by git rev-parse,
+	  E.G. a sha id, a tag, branch, ..
 
 config BR2_LINUX_KERNEL_VERSION
 	string