1 files changed, 1 insertions, 1 deletions

diff --git a/src/WixToolset.Core/WixToolsetServiceProvider.cs b/src/WixToolset.Core/WixToolsetServiceProvider.cs
index 74c886d6..5c7b318e 100644
--- a/src/WixToolset.Core/WixToolsetServiceProvider.cs
+++ b/src/WixToolset.Core/WixToolsetServiceProvider.cs
@@ -49,8 +49,8 @@ namespace WixToolset.Core
             this.AddService<ILinker>((provider, singletons) => new Linker(provider));
             this.AddService<IResolver>((provider, singletons) => new Resolver(provider));
 
-            // Internal implementations.
             this.AddService<ILocalizer>((provider, singletons) => new Localizer(provider));
+            this.AddService<IVariableResolver>((provider, singletons) => new WixVariableResolver(provider));
         }
 
         private Dictionary<Type, Func<IServiceProvider, Dictionary<Type, object>, object>> CreationFunctions { get; }