diff --git a/toolchain/Config.in b/toolchain/Config.in
index 18845820a1..83f1fd0d2a 100644
--- a/toolchain/Config.in
+++ b/toolchain/Config.in
@@ -6,6 +6,9 @@ choice
 	  Select whether to use the toolchain provided by buildroot
 	  or an external toolchain.
 
+	  Some vendors provide toolchains in binary form, some in
+	  source form.
+
 config BR2_TOOLCHAIN_BUILDROOT
 	bool "Buildroot toolchain"
 	depends on !BR2_avr32