diff --git a/target/Config.in b/target/Config.in
index c6b2e3196e..ca426c3876 100644
--- a/target/Config.in
+++ b/target/Config.in
@@ -45,6 +45,11 @@ config BR2_KERNEL_LINUX_ADVANCED
 	        kernel headers are just that (headers) and not full
 	        kernels. This is a feature.
 
+# The kernel with the same version as linux headers cannot be compiled
+# when using an external toolchain, because the linux headers are not
+# handled by Buildroot in this case.
+if BR2_TOOLCHAIN_SOURCE
+
 config BR2_KERNEL_LINUX
 	bool "linux (Same version as linux headers)"
 	select BR2_PACKAGE_LINUX
@@ -56,6 +61,8 @@ config BR2_KERNEL_LINUX
 	        kernel headers are just that (headers) and not full
 	        kernels. This is a feature.
 
+endif
+
 config BR2_KERNEL_HURD
 	bool "hurd"
 	help