I found a very easy solution to this problem. In order to tell WCF to use webservice instead, all that is needed is to add this to the .svc file
Factory="System.ServiceModel.Activation.WebServiceHostFactory"
Somehow I couldent open this file in Visual Studio, so I navigated to the project folder and opened it using notepad. My service .svc-file looks like this:
<%@ ServiceHost Language="C#" Debug="true" Service="MyNamespace.Service1" CodeBehind="Service1.svc.cs" Factory="System.ServiceModel.Activation.WebServiceHostFactory" %>