2 files changed, 9 insertions, 0 deletions

diff --git a/src/WixToolset.Core/CommandLine/CommandLineParser.cs b/src/WixToolset.Core/CommandLine/CommandLineParser.cs
index da0e979c..65aea1fc 100644
--- a/src/WixToolset.Core/CommandLine/CommandLineParser.cs
+++ b/src/WixToolset.Core/CommandLine/CommandLineParser.cs
@@ -323,6 +323,11 @@ namespace WixToolset.Core.CommandLine
                 }
             }
 
+            foreach (var extension in extensions)
+            {
+                extension.PostParse();
+            }
+
             return this;
         }
 
diff --git a/src/test/TestData/Example.Extension/ExamplePreprocessorExtensionAndCommandLine.cs b/src/test/TestData/Example.Extension/ExamplePreprocessorExtensionAndCommandLine.cs
index 0d0771f3..6f86e20d 100644
--- a/src/test/TestData/Example.Extension/ExamplePreprocessorExtensionAndCommandLine.cs
+++ b/src/test/TestData/Example.Extension/ExamplePreprocessorExtensionAndCommandLine.cs
@@ -33,6 +33,10 @@ namespace Example.Extension
             return false;
         }
 
+        public void PostParse()
+        {
+        }
+
         public override string GetVariableValue(string prefix, string name)
         {
             if (prefix == "ex" && "test".Equals(name, StringComparison.OrdinalIgnoreCase))