1 files changed, 5 insertions, 0 deletions
diff --git a/src/module-env-28.h b/src/module-env-28.h
index 40b03b92b52..f8820b0606b 100644
--- a/src/module-env-28.h
+++ b/src/module-env-28.h
@@ -16,3 +16,8 @@
   void (*make_interactive) (emacs_env *env, emacs_value function,
                             emacs_value spec)
     EMACS_ATTRIBUTE_NONNULL (1);
+
+  /* Create a unibyte Lisp string from a string.  */
+  emacs_value (*make_unibyte_string) (emacs_env *env,
+				      const char *str, ptrdiff_t len)
+    EMACS_ATTRIBUTE_NONNULL(1, 2);