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# Implicit Capture of 'This' via '\[=]' is Deprecated

### Error <a href="#error" id="error"></a>

```
Error C4855 implicit capture of 'this' via '[=]' is deprecated in '/std:c++20'
```

### Cause <a href="#cause" id="cause"></a>

Lambdas change slighlty with the upgrade to c++20, which gets implemented in 5.3. This error happens when upgrading something from 5.2 to 5.3.

### Fix <a href="#fix" id="fix"></a>

In 5.2, a lambda is defined like this:

```cpp
auto TracePositive = [=]() -> FHitResult {};
```

But in 5.3, it needs to become this:

```cpp
auto TracePositive = [=, this]() -> FHitResult {};
```