diff --git a/appveyor.yml b/appveyor.yml
index 30a6eb4b..4e0bc75d 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,4 @@
-version: 3.11.{build}
+version: 3.12.{build}
 branches:
   only:
   - master
diff --git a/src/EcsRx.Examples/Program.cs b/src/EcsRx.Examples/Program.cs
index aa49677e..3bbe3904 100644
--- a/src/EcsRx.Examples/Program.cs
+++ b/src/EcsRx.Examples/Program.cs
@@ -42,7 +42,7 @@ static void Main(string[] args)
             //new Struct3Application().StartApplication();
             //new Class4Application().StartApplication();
             //new Struct4Application().StartApplication();            
-            new Struct4BApplication().StartApplication();
+            //new Struct4BApplication().StartApplication();
 
         }
     }
diff --git a/src/EcsRx/Groups/GroupBuilder.cs b/src/EcsRx/Groups/GroupBuilder.cs
index f894e9cb..dcf3e86f 100644
--- a/src/EcsRx/Groups/GroupBuilder.cs
+++ b/src/EcsRx/Groups/GroupBuilder.cs
@@ -35,7 +35,18 @@ public GroupBuilder WithoutComponent<T>() where T : class, IComponent
             _withoutComponents.Add(typeof(T));
             return this;
         }
-
+        
+        public GroupBuilder WithStructComponent<T>() where T : struct, IComponent
+        {
+            _withComponents.Add(typeof(T));
+            return this;
+        }
+        
+        public GroupBuilder WithoutStructComponent<T>() where T : struct, IComponent
+        {
+            _withoutComponents.Add(typeof(T));
+            return this;
+        }
 
         public GroupBuilder WithPredicate(Predicate<IEntity> predicate)
         {