diff --git a/Source/cmSystemTools.cxx b/Source/cmSystemTools.cxx
index 1ffd4f7a0..08b414d40 100644
--- a/Source/cmSystemTools.cxx
+++ b/Source/cmSystemTools.cxx
@@ -1392,6 +1392,7 @@ bool cmSystemTools::RunCommand(const char* command,
     {
     commandInDir = command;
     }
+  commandInDir += " 2>&1";
   command = commandInDir.c_str();
   const int BUFFER_SIZE = 4096;
   char buffer[BUFFER_SIZE];