diff --git a/toolchain/toolchain-external/Config.in b/toolchain/toolchain-external/Config.in
index 94ae735219..105fb2a26e 100644
--- a/toolchain/toolchain-external/Config.in
+++ b/toolchain/toolchain-external/Config.in
@@ -692,8 +692,13 @@ config BR2_TOOLCHAIN_EXTERNAL_CUSTOM_UCLIBC
 	select BR2_TOOLCHAIN_HAS_SHADOW_PASSWORDS
 
 config BR2_TOOLCHAIN_EXTERNAL_CUSTOM_GLIBC
-	bool "glibc"
+	bool "glibc/eglibc"
 	select BR2_TOOLCHAIN_EXTERNAL_GLIBC
+	help
+	  Note: eglibc is a variant of glibc that (among other things) can be
+	  configured to exclude some of its features. Using a toolchain with
+	  eglibc configured to exclude key features may cause build failures to
+	  some packages.
 
 endchoice