diff --git a/ChangeLog b/ChangeLog
index add82b3f..49fc5457 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -18369,3 +18369,6 @@
 	notifications.
 2019-01-11 Fred Gleason <fredg@paravelsystems.com>
 	* Incremented the package version to 3.0.0alpha05.
+2019-01-13 Patrick Linstruth <patrick@deltecent.com>
+	* Fixed a bug in RDLogManager that allowed cloned clock lines to pass
+	hour mark.
diff --git a/rdlogmanager/edit_clock.cpp b/rdlogmanager/edit_clock.cpp
index eb4a15b5..74fe614f 100644
--- a/rdlogmanager/edit_clock.cpp
+++ b/rdlogmanager/edit_clock.cpp
@@ -350,6 +350,9 @@ void EditClock::cloneData()
   eventline.setName(selectedEventLine->name());
   eventline.setStartTime(selectedEventLine->startTime().addMSecs(selectedEventLine->length()));
   eventline.setLength(selectedEventLine->length());
+  if(eventline.startTime().addMSecs(eventline.length()).hour()) {
+    eventline.setLength(0);
+  }
   
   EditEventLine *edit_eventline=
     new EditEventLine(&eventline,edit_clock,-1,this);