diff --git a/Source/cmUseMangledMesaCommand.h b/Source/cmUseMangledMesaCommand.h
index 141995dd9..fec2265ed 100644
--- a/Source/cmUseMangledMesaCommand.h
+++ b/Source/cmUseMangledMesaCommand.h
@@ -30,7 +30,7 @@ public:
   /**
    * This is a virtual constructor for the command.
    */
-  virtual cmCommand* Clone() 
+  virtual cmCommand* Clone()
     {
     return new cmUseMangledMesaCommand;
     }
@@ -41,7 +41,7 @@ public:
    */
   virtual bool InitialPass(std::vector<std::string> const& args,
                            cmExecutionStatus &status);
-  
+
   /**
    * The name of the command as specified in CMakeList.txt.
    */
@@ -50,11 +50,11 @@ public:
   /**
    * Succinct documentation.
    */
-  virtual const char* GetTerseDocumentation() 
+  virtual const char* GetTerseDocumentation()
     {
     return "Copy mesa headers for use in combination with system GL.";
     }
-  
+
   /**
    * More documentation.
    */
@@ -68,6 +68,11 @@ public:
       "being added to the include directory path earlier.";
     }
 
+  /**
+   * This determines if the command is invoked when in script mode.
+   */
+  virtual bool IsScriptable() { return true; }
+
   /** This command is kept for compatibility with older CMake versions. */
   virtual bool IsDiscouraged()
     {
@@ -80,5 +85,4 @@ protected:
 };
 
 
-
 #endif