diff --git a/config.sub b/config.sub
index 0a7ce34..baf1512 100755
--- a/config.sub
+++ b/config.sub
@@ -1779,7 +1779,7 @@ esac
 # (given a valid OS), if there is a kernel.
 case $kernel-$os in
 	linux-gnu* | linux-dietlibc* | linux-android* | linux-newlib* \
-		   | linux-musl* | linux-relibc* | linux-uclibc* )
+		   | linux-musl* | linux-relibc* | linux-uclibc* | linux-mlibc* )
 		;;
 	uclinux-uclibc* )
 		;;
diff --git a/testsuite/config-sub.data b/testsuite/config-sub.data
index ac06881..3b622ab 100644
--- a/testsuite/config-sub.data
+++ b/testsuite/config-sub.data
@@ -16,6 +16,7 @@ aarch64-bme					aarch64-unknown-bme
 aarch64-elf					aarch64-unknown-elf
 aarch64-genode					aarch64-unknown-genode
 aarch64-linux					aarch64-unknown-linux-gnu
+aarch64-linux-mlibc				aarch64-unknown-linux-mlibc
 aarch64-managarm				aarch64-unknown-managarm-mlibc
 aarch64-managarm-kernel				aarch64-unknown-managarm-kernel
 aarch64-managarm-mlibc				aarch64-unknown-managarm-mlibc
@@ -618,6 +619,7 @@ riscv-company-elf				riscv-company-elf
 riscv-company-hcos				riscv-company-hcos
 riscv-elf					riscv-unknown-elf
 riscv-linux					riscv-unknown-linux-gnu
+riscv-linux-mlibc				riscv-unknown-linux-mlibc
 riscv-managarm					riscv-unknown-managarm-mlibc
 riscv-managarm-kernel				riscv-unknown-managarm-kernel
 riscv-managarm-mlibc				riscv-unknown-managarm-mlibc
@@ -847,6 +849,7 @@ x86_64-ericsson-dicos				x86_64-ericsson-dicos
 x86_64-fuchsia					x86_64-pc-fuchsia
 x86_64-genode					x86_64-pc-genode
 x86_64-glidix					x86_64-pc-glidix
+x86_64-linux-mlibc				x86_64-pc-linux-mlibc
 x86_64-linux-relibc				x86_64-pc-linux-relibc
 x86_64-managarm					x86_64-pc-managarm-mlibc
 x86_64-managarm-kernel				x86_64-pc-managarm-kernel