diff --git a/Source/cmCPluginAPI.cxx b/Source/cmCPluginAPI.cxx
index b14116037..6fb744eb3 100644
--- a/Source/cmCPluginAPI.cxx
+++ b/Source/cmCPluginAPI.cxx
@@ -312,7 +312,7 @@ void cmExpandSourceListArguments(void *arg,
     }
   mf->ExpandSourceListArguments(args2, result, startArgumentIndex);
   int resargc = static_cast<int>(result.size());
-  char **resargv = NULL;
+  char **resargv = 0;
   if (resargc)
     {
     resargv = (char **)malloc(resargc*sizeof(char *));
diff --git a/Source/cmLoadCommandCommand.cxx b/Source/cmLoadCommandCommand.cxx
index 16e16ee92..3c098f513 100644
--- a/Source/cmLoadCommandCommand.cxx
+++ b/Source/cmLoadCommandCommand.cxx
@@ -114,7 +114,7 @@ bool cmLoadedCommand::InitialPass(std::vector<std::string> const& args)
   
   // create argc and argv and then invoke the command
   int argc = static_cast<int> (args.size());
-  char **argv = NULL;
+  char **argv = 0;
   if (argc)
     {
     argv = (char **)malloc(argc*sizeof(char *));