diff --git a/src/core/proxy.ts b/src/core/proxy.ts
index dbccbc20..2469d73e 100644
--- a/src/core/proxy.ts
+++ b/src/core/proxy.ts
@@ -18,7 +18,6 @@ import {
 	ProxyTypeProxyObject,
 	ProxyTypeProxyArray
 } from "../internal"
-import {isDraft} from "../utils/common"
 
 interface ProxyBaseState extends ImmerBaseState {
 	assigned_: {