diff --git a/src/Chapter12/Listing12.16.PassingADelegateWithAnExpressionLambda.cs b/src/Chapter12/Listing12.16A.PassingADelegateWithAnExpressionLambda.cs
similarity index 98%
rename from src/Chapter12/Listing12.16.PassingADelegateWithAnExpressionLambda.cs
rename to src/Chapter12/Listing12.16A.PassingADelegateWithAnExpressionLambda.cs
index f60500697..216e87d9a 100644
--- a/src/Chapter12/Listing12.16.PassingADelegateWithAnExpressionLambda.cs
+++ b/src/Chapter12/Listing12.16A.PassingADelegateWithAnExpressionLambda.cs
@@ -1,4 +1,4 @@
-namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter12.Listing12_15
+namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter12.Listing12_16A
 {
     using System;
     using Listing12_10;
diff --git a/src/Chapter12/Listing12.16__.PassingADelegateWithAStatementLambda.cs b/src/Chapter12/Listing12.16B.PassingADelegateWithAStatementLambda.cs
similarity index 98%
rename from src/Chapter12/Listing12.16__.PassingADelegateWithAStatementLambda.cs
rename to src/Chapter12/Listing12.16B.PassingADelegateWithAStatementLambda.cs
index 0c1e38879..d254212fd 100644
--- a/src/Chapter12/Listing12.16__.PassingADelegateWithAStatementLambda.cs
+++ b/src/Chapter12/Listing12.16B.PassingADelegateWithAStatementLambda.cs
@@ -1,4 +1,4 @@
-namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter12.Listing12_15__
+namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter12.Listing12_16B
 {
     using System;
     using Listing12_10;