Changed event on Player's WalkSpeed? (EASY)

I need help D: it isntt working

	Char:WaitForChild("Humanoid").WalkSpeed.Changed:Connect(function()
		WalkSpeed.Value = Char:WaitForChild("Humanoid").WalkSpeed
	end)
end)

###Numbers don't have changed events. Objects do!

Char.Humanoid.Changed:Connect(function(prop)
    if prop == "WalkSpeed" then
        -- code 
    end
end)