diff --git a/encompass-cs/Engine.cs b/encompass-cs/Engine.cs
index ab44af6..4e56064 100644
--- a/encompass-cs/Engine.cs
+++ b/encompass-cs/Engine.cs
@@ -166,6 +166,11 @@ namespace Encompass
 
         protected bool HasComponent<TComponent>(Entity entity) where TComponent : struct, IComponent
         {
+            if (!readTypes.Contains(typeof(TComponent)))
+            {
+                throw new IllegalReadException("Engine {0} tried to read undeclared Component {1}", this.GetType().Name, typeof(TComponent).Name);
+            }
+            
             return componentManager.EntityHasComponentOfType<TComponent>(entity.ID);
         }
 
diff --git a/encompass-cs/Renderer.cs b/encompass-cs/Renderer.cs
index d96e93e..1e122b2 100644
--- a/encompass-cs/Renderer.cs
+++ b/encompass-cs/Renderer.cs
@@ -58,5 +58,15 @@ namespace Encompass
         {
             return GetComponents<TComponent>(entity).First();
         }
+
+        protected bool HasComponent<TComponent>(Entity entity) where TComponent : struct, IComponent
+        {
+            return componentManager.EntityHasComponentOfType<TComponent>(entity.ID);
+        }
+
+        protected bool SomeComponent<TComponent>() where TComponent : struct, IComponent
+        {
+            return componentManager.GetActiveComponentsByType<TComponent>().Any();
+        }
     }
 }
diff --git a/test/ComponentTest.cs b/test/ComponentTest.cs
index 30e1ba6..554e083 100644
--- a/test/ComponentTest.cs
+++ b/test/ComponentTest.cs
@@ -201,7 +201,7 @@ namespace Tests
             public Entity entity;
         }
 
-        [Reads(typeof(HasComponentWhenInactiveTestMessage))]
+        [Reads(typeof(HasComponentWhenInactiveTestMessage), typeof(MockComponent))]
         class HasComponentWhenInactiveTestEngine : Engine
         {
             public override void Update(double dt)
@@ -290,7 +290,7 @@ namespace Tests
             public Guid componentID;
         }
 
-        [Reads(typeof(ActivateComponentMessage))]
+        [Reads(typeof(ActivateComponentMessage), typeof(MockComponent))]
         [Writes(typeof(MockComponent))]
         class ActivateComponentEngine : Engine
         {
@@ -336,7 +336,7 @@ namespace Tests
             public Guid componentID;
         }
 
-        [Reads(typeof(DeactivateComponentMessage))]
+        [Reads(typeof(DeactivateComponentMessage), typeof(MockComponent))]
         [Writes(typeof(MockComponent))]
         class DeactivateComponentEngine : Engine
         {