diff --git a/elisp/private/tools/build_emacs.cc b/elisp/private/tools/build_emacs.cc
index ef3589fa..3cb9aef6 100644
--- a/elisp/private/tools/build_emacs.cc
+++ b/elisp/private/tools/build_emacs.cc
@@ -210,7 +210,7 @@ static absl::Status Build(const FileName& source, const FileName& install,
       RULES_ELISP_NATIVE_LITERAL("CFLAGS=") + NativeString(cflags),
       RULES_ELISP_NATIVE_LITERAL("LDFLAGS=") + NativeString(ldflags),
       // Try to work around https://bugs.gnu.org/79489 in older Emacsen.
-      // FIXME: Remove this once we drop support for Emacs 29 and 30.
+      // FIXME: Remove this once we drop support for Emacs 30.
       RULES_ELISP_NATIVE_LITERAL(
           "ac_cv_func_posix_spawn_file_actions_addchdir=no"),
   };