diff --git a/Source/cmFunctionCommand.cxx b/Source/cmFunctionCommand.cxx
index b05642e3d..b2265746a 100644
--- a/Source/cmFunctionCommand.cxx
+++ b/Source/cmFunctionCommand.cxx
@@ -112,15 +112,19 @@ bool cmFunctionHelperCommand::InvokeInitialPass
   // set the value of argc
   cmOStringStream strStream;
   strStream << expandedArgs.size();
+  this->Makefile->MarkVariableAsUsed("ARGC");
   this->Makefile->AddDefinition("ARGC",strStream.str().c_str());
+  this->Makefile->MarkVariableAsUsed("ARGC");
 
   // set the values for ARGV0 ARGV1 ...
   for (unsigned int t = 0; t < expandedArgs.size(); ++t)
     {
     cmOStringStream tmpStream;
     tmpStream << "ARGV" << t;
+    this->Makefile->MarkVariableAsUsed(tmpStream.str().c_str());
     this->Makefile->AddDefinition(tmpStream.str().c_str(), 
                                   expandedArgs[t].c_str());
+    this->Makefile->MarkVariableAsUsed(tmpStream.str().c_str());
     }
   
   // define the formal arguments
@@ -152,8 +156,12 @@ bool cmFunctionHelperCommand::InvokeInitialPass
       }
     cnt ++;
     }
+  this->Makefile->MarkVariableAsUsed("ARGV");
   this->Makefile->AddDefinition("ARGV", argvDef.c_str());
+  this->Makefile->MarkVariableAsUsed("ARGV");
+  this->Makefile->MarkVariableAsUsed("ARGN");
   this->Makefile->AddDefinition("ARGN", argnDef.c_str());
+  this->Makefile->MarkVariableAsUsed("ARGN");
 
   // Invoke all the functions that were collected in the block.
   // for each function