diff --git a/platform/qt/qsacnuniverse.cpp b/platform/qt/qsacnuniverse.cpp
index cea43ec..ec0a66e 100644
--- a/platform/qt/qsacnuniverse.cpp
+++ b/platform/qt/qsacnuniverse.cpp
@@ -238,27 +238,26 @@ void QSacnUniverse::setValue (const uint16_t addr, const uint16_t size,
  */
 void QSacnUniverse::syncSources()
 {
+  // create a new list of sources
   QMap<sACN::DATA::data_header, QSacnUniverse*> newSources;
 
   auto headers = universe_->sources();
   for (const auto & metadata : headers)
     {
-      auto it = sources_.find(metadata);
-      if (it == sources_.end())
-        { // not found
+      if (sources_.contains(metadata))
+        // move the QSacnUniverse to the new list
+        newSources.insert(metadata, sources_.take(metadata));
+      else
+        { // make a new QSacnUniverse to add to the new list
           auto universe = universe_->sourceUniverse(metadata);
           newSources.insert(metadata, new QSacnUniverse(this, universe));
         }
-      else
-        { // found
-          auto universe = sources_.take(metadata);
-          newSources.insert(metadata, universe);
-        }
     }
 
-  // delete any remaining QSacnUniverse, ie. not moved to the new list
+  // delete any remaining sources, ie. not moved to the new list
   qDeleteAll(sources_);
 
+  // accept the new list
   sources_ = newSources;
   emit sourceListChanged();
 }