diff --git a/include/mruby.h b/include/mruby.h
index 65fe84778..7f5b76633 100644
--- a/include/mruby.h
+++ b/include/mruby.h
@@ -1186,12 +1186,12 @@ MRB_API mrb_value mrb_funcall_argv(mrb_state *mrb, mrb_value val, mrb_sym name,
  * Convenience wrappers for `mrb_funcall_argv` with a fixed argument count.
  * Avoids the 16-slot fixed argv buffer used by the variadic `mrb_funcall_id`.
  */
-static inline mrb_value
+MRB_INLINE mrb_value
 mrb_funcall_argv1(mrb_state *mrb, mrb_value val, mrb_sym name, mrb_value a1)
 {
   return mrb_funcall_argv(mrb, val, name, 1, &a1);
 }
-static inline mrb_value
+MRB_INLINE mrb_value
 mrb_funcall_argv2(mrb_state *mrb, mrb_value val, mrb_sym name, mrb_value a1, mrb_value a2)
 {
   const mrb_value argv[] = { a1, a2 };