diff --git a/apps/dsm/mods/mod_py/ModPy.cpp b/apps/dsm/mods/mod_py/ModPy.cpp
index 3a57eab0..7ed3c0ae 100644
--- a/apps/dsm/mods/mod_py/ModPy.cpp
+++ b/apps/dsm/mods/mod_py/ModPy.cpp
@@ -84,7 +84,6 @@ int SCPyModule::preload() {
 
   PyEval_ReleaseLock();
   return 0;
-//   _thr_state = PyEval_SaveThread();
 }
 
 DSMAction* SCPyModule::getAction(const string& from_str) {
diff --git a/apps/dsm/mods/mod_py/Readme.mod_py.txt b/apps/dsm/mods/mod_py/Readme.mod_py.txt
index 7a08dc3c..5ecb1bcc 100644
--- a/apps/dsm/mods/mod_py/Readme.mod_py.txt
+++ b/apps/dsm/mods/mod_py/Readme.mod_py.txt
@@ -23,6 +23,10 @@ Indentation is a little ugly with multi-line py() actions.
 But this is Python's fault (in 21st century, who creates a 
 programming language with fixed indentation?).
 
+mod_py MUST be preloaded, to initialize the python interpreter.
+add preload=mod_py to dsm.conf. 
+
+
 locals
 ======
 type    - event type (dsm.Timer, dsm.Key, ...)