diff --git a/scripts/ext-toolchain.sh b/scripts/ext-toolchain.sh
index c9ceb150c1..1ef3f42c50 100755
--- a/scripts/ext-toolchain.sh
+++ b/scripts/ext-toolchain.sh
@@ -546,6 +546,7 @@ while [ -n "$1" ]; do
 
 		--config)
 			if probe_cc; then
+				probe_libc
 				print_config "$1"
 				exit $?
 			fi