diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index 82b3829a52..d37a2a3b73 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -338,12 +338,6 @@ vm_env_write(const VALUE *ep, int index, VALUE v)
     }
 }
 
-void
-rb_vm_env_write(const VALUE *ep, int index, VALUE v)
-{
-    vm_env_write(ep, index, v);
-}
-
 VALUE
 rb_vm_bh_to_procval(const rb_execution_context_t *ec, VALUE block_handler)
 {