diff --git a/src/Generator/Pass.cs b/src/Generator/Passes/Pass.cs
similarity index 90%
rename from src/Generator/Pass.cs
rename to src/Generator/Passes/Pass.cs
index adc4da0b..376a294f 100644
--- a/src/Generator/Pass.cs
+++ b/src/Generator/Passes/Pass.cs
@@ -17,6 +17,14 @@ namespace Cxxi.Passes
             return false;
         }
 
+        /// <summary>
+        /// Processes a translation unit.
+        /// </summary>
+        public virtual bool ProcessUnit(TranslationUnit unit)
+        {
+            return false;
+        }
+
         /// <summary>
         /// Processes a declaration.
         /// </summary>