diff --git a/include/mruby/internal.h b/include/mruby/internal.h
index 8b04166e4..bb987e340 100644
--- a/include/mruby/internal.h
+++ b/include/mruby/internal.h
@@ -21,6 +21,7 @@ mrb_bool mrb_const_name_p(mrb_state*, const char*, mrb_int);
 mrb_value mrb_class_find_path(mrb_state*, struct RClass*);
 mrb_value mrb_mod_to_s(mrb_state *, mrb_value);
 void mrb_method_added(mrb_state *mrb, struct RClass *c, mrb_sym mid);
+mrb_noreturn void mrb_method_missing(mrb_state *mrb, mrb_sym name, mrb_value self, mrb_value args);
 #endif
 
 /* debug */
diff --git a/mrbgems/mruby-binding/src/binding.c b/mrbgems/mruby-binding/src/binding.c
index e4c362793..f01dd8c0d 100644
--- a/mrbgems/mruby-binding/src/binding.c
+++ b/mrbgems/mruby-binding/src/binding.c
@@ -4,10 +4,10 @@
 #include <mruby/compile.h>
 #include <mruby/error.h>
 #include <mruby/proc.h>
-#include <mruby/presym.h>
 #include <mruby/string.h>
+#include <mruby/internal.h>
+#include <mruby/presym.h>
 
-mrb_noreturn void mrb_method_missing(mrb_state *mrb, mrb_sym name, mrb_value self, mrb_value args);
 void mrb_proc_merge_lvar(mrb_state *mrb, mrb_irep *irep, struct REnv *env, int num, const mrb_sym *lv, const mrb_value *stack);
 mrb_value mrb_exec_irep(mrb_state *mrb, mrb_value self, struct RProc *p);
 const struct RProc *mrb_binding_extract_proc(mrb_state *mrb, mrb_value binding);
diff --git a/mrbgems/mruby-method/src/method.c b/mrbgems/mruby-method/src/method.c
index 093d4c5a0..bf59d616b 100644
--- a/mrbgems/mruby-method/src/method.c
+++ b/mrbgems/mruby-method/src/method.c
@@ -7,7 +7,6 @@
 #include "mruby/internal.h"
 #include "mruby/presym.h"
 
-mrb_noreturn void mrb_method_missing(mrb_state *mrb, mrb_sym name, mrb_value self, mrb_value args);
 mrb_value mrb_exec_irep(mrb_state *mrb, mrb_value self, struct RProc *p);
 
 // Defined by mruby-proc-ext on which mruby-method depends
diff --git a/src/vm.c b/src/vm.c
index 4ff124946..a7f05db66 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -90,8 +90,6 @@ mrb_gc_arena_shrink(mrb_state *mrb, int idx)
 #define CALL_MAXARGS 15
 #define CALL_VARARGS (CALL_MAXARGS<<4 | CALL_MAXARGS)
 
-void mrb_method_missing(mrb_state *mrb, mrb_sym name, mrb_value self, mrb_value args);
-
 static inline void
 stack_clear(mrb_value *from, size_t count)
 {