diff --git a/common/source/java/ch/systemsx/cisd/common/logging/LogInitializer.java b/common/source/java/ch/systemsx/cisd/common/logging/LogInitializer.java
index a4abbe8658dc0482d4a8c64612ec92f70f7c2f15..b735963d684563cd9c588740f4bbbf6ab8d2b9dc 100644
--- a/common/source/java/ch/systemsx/cisd/common/logging/LogInitializer.java
+++ b/common/source/java/ch/systemsx/cisd/common/logging/LogInitializer.java
@@ -20,6 +20,7 @@ import java.io.File;
 import java.net.URL;
 
 import org.apache.log4j.BasicConfigurator;
+import org.apache.log4j.helpers.LogLog;
 import org.apache.log4j.xml.DOMConfigurator;
 
 /**
@@ -69,6 +70,7 @@ public class LogInitializer
             }
         }
         initialized = true;
+        LogLog.setQuietMode(true);
     }
 
 }