How to change maxWalkSpeed in c++

I have an error. this deceleration has no storage.

UCharacterMovementComponent* CharacterMovement = GetCharacterMovement();
float WalkSpeed = CharacterMovement->MaxWalkSpeed;
CharacterMovement->MaxWalkSpeed = WalkSpeed * 3;

You have to include the character movement component:

#include “GameFramework/CharacterMovementComponent.h”