diff --git a/oscar/SleepLib/calcs.cpp b/oscar/SleepLib/calcs.cpp
index 54e47047..3d4bbaa3 100644
--- a/oscar/SleepLib/calcs.cpp
+++ b/oscar/SleepLib/calcs.cpp
@@ -292,7 +292,7 @@ void FlowParser::openFlow(Session *session, EventList *flow)
     // Make sure we won't overflow internal buffers
     if (m_samples > max_filter_buf_size_entries) {
         qDebug() << "Error: Sample size exceeds max_filter_buf_size_entries in FlowParser::openFlow().. Capping!!!  " 
-            << DateTime::fromMSecsSinceEpoch(session->realFirst()).toString();
+            << QDateTime::fromMSecsSinceEpoch(session->realFirst()).toString();
         m_samples = max_filter_buf_size_entries;
     }