diff --git a/source/tlang/compiler/codegen/emit/core.d b/source/tlang/compiler/codegen/emit/core.d
index 047cd0b..5dda416 100644
--- a/source/tlang/compiler/codegen/emit/core.d
+++ b/source/tlang/compiler/codegen/emit/core.d
@@ -165,7 +165,11 @@ public abstract class CodeEmitter
      *
      * Params:
      *   instruction = The Instruction to transform/emit
+     *   customRules = an `Object` to be interpreted by
+     * the underlying emitter which can change how certain
+     * transformations are done when it is in a certain state
+     *
      * Returns: The Instruction emit as a string
      */
-    public abstract string transform(Instruction instruction);
+    public abstract string transform(Instruction instruction, Object customRules = null);
 }
\ No newline at end of file
diff --git a/source/tlang/compiler/codegen/emit/dgen.d b/source/tlang/compiler/codegen/emit/dgen.d
index 4a9a719..196b3c7 100644
--- a/source/tlang/compiler/codegen/emit/dgen.d
+++ b/source/tlang/compiler/codegen/emit/dgen.d
@@ -110,7 +110,7 @@ public final class DCodeEmitter : CodeEmitter
     }
 
 
-    public override string transform(const Instruction instruction)
+    public override string transform(const Instruction instruction, Object customRules = null)
     {
         writeln("\n");
         gprintln("transform(): "~to!(string)(instruction));