diff --git a/src/mod/languages/mod_managed/managed/Makefile b/src/mod/languages/mod_managed/managed/Makefile
index f5f46d07bd..160cf620e2 100644
--- a/src/mod/languages/mod_managed/managed/Makefile
+++ b/src/mod/languages/mod_managed/managed/Makefile
@@ -4,7 +4,7 @@ clean:
 	rm -fr FreeSWITCH.Managed.dll
 
 FreeSWITCH.Managed.dll: AssemblyInfo.cs Extensions.cs Loader.cs Log.cs ManagedSession.cs PluginInterfaces.cs PluginManager.cs ScriptPluginManager.cs swig.cs
-	gmcs -target:library -out:FreeSWITCH.Managed.dll AssemblyInfo.cs Extensions.cs Loader.cs Log.cs ManagedSession.cs PluginInterfaces.cs PluginManager.cs ScriptPluginManager.cs swig.cs
+	gmcs -target:library -out:FreeSWITCH.Managed.dll AssemblyInfo.cs Extensions.cs Loader.cs Log.cs ManagedSession.cs PluginInterfaces.cs PluginManager.cs ScriptPluginManager.cs ChannelVariables.cs swig.cs
 
 install: FreeSWITCH.Managed.dll
 	$(INSTALL) FreeSWITCH.Managed.dll $(DESTDIR)$(MODINSTDIR)