diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index 0b15794210..6c2458f32e 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -5227,12 +5227,6 @@ vm_opt_aset(VALUE recv, VALUE obj, VALUE set)
     }
 }
 
-VALUE
-rb_vm_opt_aset(VALUE recv, VALUE obj, VALUE set)
-{
-    return vm_opt_aset(recv, obj, set);
-}
-
 static VALUE
 vm_opt_aref_with(VALUE recv, VALUE key)
 {
diff --git a/yjit_codegen.c b/yjit_codegen.c
index 2c71fd8043..a3000c30df 100644
--- a/yjit_codegen.c
+++ b/yjit_codegen.c
@@ -2176,8 +2176,6 @@ gen_opt_aref(jitstate_t *jit, ctx_t *ctx)
     }
 }
 
-VALUE rb_vm_opt_aset(VALUE recv, VALUE obj, VALUE set);
-
 static codegen_status_t
 gen_opt_aset(jitstate_t *jit, ctx_t *ctx)
 {