diff --git a/mjit_compile.c b/mjit_compile.c
index 226d3e30a7..fc864c6187 100644
--- a/mjit_compile.c
+++ b/mjit_compile.c
@@ -48,10 +48,6 @@ get_iseq_if_available(CALL_CACHE cc)
     return NULL;
 }
 
-/* TODO: move to somewhere shared with vm_args.c */
-#define IS_ARGS_SPLAT(ci)   ((ci)->flag & VM_CALL_ARGS_SPLAT)
-#define IS_ARGS_KEYWORD(ci) ((ci)->flag & VM_CALL_KWARG)
-
 /* Returns TRUE if iseq is inlinable, otherwise NULL. This becomes TRUE in the same condition
    as CI_SET_FASTPATH (in vm_callee_setup_arg) is called from vm_call_iseq_setup. */
 static int
diff --git a/vm_args.c b/vm_args.c
index 3bb2bd0a4b..d1207f7f62 100644
--- a/vm_args.c
+++ b/vm_args.c
@@ -884,11 +884,3 @@ vm_caller_setup_arg_block(const rb_execution_context_t *ec, rb_control_frame_t *
 	}
     }
 }
-
-#define IS_ARGS_SPLAT(ci)   ((ci)->flag & VM_CALL_ARGS_SPLAT)
-#define IS_ARGS_KEYWORD(ci) ((ci)->flag & VM_CALL_KWARG)
-
-#define CALLER_SETUP_ARG(cfp, calling, ci) do { \
-    if (UNLIKELY(IS_ARGS_SPLAT(ci))) vm_caller_setup_arg_splat((cfp), (calling)); \
-    if (UNLIKELY(IS_ARGS_KEYWORD(ci))) vm_caller_setup_arg_kw((cfp), (calling), (ci)); \
-} while (0)
diff --git a/vm_insnhelper.h b/vm_insnhelper.h
index 1dd491cf7f..c07a937855 100644
--- a/vm_insnhelper.h
+++ b/vm_insnhelper.h
@@ -244,4 +244,12 @@ THROW_DATA_CONSUMED_SET(struct vm_throw_data *obj)
     }
 }
 
+#define IS_ARGS_SPLAT(ci)   ((ci)->flag & VM_CALL_ARGS_SPLAT)
+#define IS_ARGS_KEYWORD(ci) ((ci)->flag & VM_CALL_KWARG)
+
+#define CALLER_SETUP_ARG(cfp, calling, ci) do { \
+    if (UNLIKELY(IS_ARGS_SPLAT(ci))) vm_caller_setup_arg_splat((cfp), (calling)); \
+    if (UNLIKELY(IS_ARGS_KEYWORD(ci))) vm_caller_setup_arg_kw((cfp), (calling), (ci)); \
+} while (0)
+
 #endif /* RUBY_INSNHELPER_H */