diff --git a/method.h b/method.h
index 2547a2ab5b..0ec1a09759 100644
--- a/method.h
+++ b/method.h
@@ -194,7 +194,6 @@ const rb_method_entry_t *rb_resolve_refined_method(VALUE refinements, const rb_m
 const rb_callable_method_entry_t *rb_callable_method_entry(VALUE klass, ID id);
 const rb_callable_method_entry_t *rb_callable_method_entry_with_refinements(VALUE klass, ID id, VALUE *defined_class);
 const rb_callable_method_entry_t *rb_callable_method_entry_without_refinements(VALUE klass, ID id, VALUE *defined_class);
-const rb_callable_method_entry_t *rb_resolve_refined_method_callable(VALUE refinements, const rb_callable_method_entry_t *me);
 
 int rb_method_entry_arity(const rb_method_entry_t *me);
 int rb_method_entry_eq(const rb_method_entry_t *m1, const rb_method_entry_t *m2);
diff --git a/vm_method.c b/vm_method.c
index c854164a1b..edbe6038dd 100644
--- a/vm_method.c
+++ b/vm_method.c
@@ -936,7 +936,7 @@ rb_resolve_refined_method(VALUE refinements, const rb_method_entry_t *me)
     return resolve_refined_method(refinements, me, NULL);
 }
 
-const rb_callable_method_entry_t *
+static const rb_callable_method_entry_t *
 rb_resolve_refined_method_callable(VALUE refinements, const rb_callable_method_entry_t *me)
 {
     VALUE defined_class = me->defined_class;