diff --git a/Code/Mantid/Framework/API/src/Algorithm.cpp b/Code/Mantid/Framework/API/src/Algorithm.cpp
index baa68a78bc80..147e455f1fc2 100644
--- a/Code/Mantid/Framework/API/src/Algorithm.cpp
+++ b/Code/Mantid/Framework/API/src/Algorithm.cpp
@@ -816,9 +816,7 @@ namespace Mantid
 
       if (startProgress >= 0 && endProgress > startProgress && endProgress <= 1.)
       {
-        std::cerr << "progress observer=" << m_progressObserver << "\n";
         alg->addObserver(this->progressObserver());
-        std::cerr << "progress observer=" << m_progressObserver << "\n";
         m_startChildProgress = startProgress;
         m_endChildProgress = endProgress;
       }