diff --git a/utils/bazel/llvm-project-overlay/libc/test/libc_test_rules.bzl b/utils/bazel/llvm-project-overlay/libc/test/libc_test_rules.bzl
--- a/utils/bazel/llvm-project-overlay/libc/test/libc_test_rules.bzl
+++ b/utils/bazel/llvm-project-overlay/libc/test/libc_test_rules.bzl
@@ -28,6 +28,7 @@
         name = name,
         srcs = srcs,
         deps = [d + INTERNAL_SUFFIX for d in libc_function_deps] + [
+            "//libc:errno",
             "//libc:libc_root",
             "//libc/test/UnitTest:LibcUnitTest",
         ] + deps,