diff --git a/packages/mobx-react-lite/src/ObserverComponent.ts b/packages/mobx-react-lite/src/ObserverComponent.ts
index 5b0dc599b..b3875300b 100644
--- a/packages/mobx-react-lite/src/ObserverComponent.ts
+++ b/packages/mobx-react-lite/src/ObserverComponent.ts
@@ -6,6 +6,11 @@ interface IObserverProps {
 }
 
 function ObserverComponent({ children, render }: IObserverProps) {
+    if (children && render) {
+        console.error(
+            "MobX Observer: Do not use children and render in the same time in `Observer`"
+        )
+    }
     const component = children || render
     if (typeof component !== "function") {
         return null