diff --git a/BUILD.bazel b/BUILD.bazel
index 061e0ed4a09..9e6d2babbc6 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -164,6 +164,7 @@ cc_library(
     name = "tcl_readline_setup",
     srcs = ["src/tcl_readline_setup.cc"],
     hdrs = ["src/tcl_readline_setup.h"],
+    visibility = ["//src/sta:__pkg__"],
     deps = [
         "@tcl_lang//:tcl",
         # tclreadline: provides ENABLE_READLINE define + links libtclreadline.