diff --git a/lib/vistle/module/module.cpp b/lib/vistle/module/module.cpp
index 5a9426f63..e69b4fc83 100644
--- a/lib/vistle/module/module.cpp
+++ b/lib/vistle/module/module.cpp
@@ -47,7 +47,7 @@
 #include <vistle/core/archive_saver.h>
 #include <vistle/core/archive_loader.h>
 
-#define MPI_DEBUG
+//#define MPI_DEBUG
 //#define DEBUG
 //#define REDUCE_DEBUG
 #define DETAILED_PROGRESS