diff --git a/src/core/pal/pal.cpp b/src/core/pal/pal.cpp
index 5e22d5c2cd0..804b880c533 100644
--- a/src/core/pal/pal.cpp
+++ b/src/core/pal/pal.cpp
@@ -88,7 +88,7 @@ Layer *Pal::addLayer( QgsAbstractLabelProvider *provider, const QString &layerNa
 
   std::unique_ptr< Layer > layer = qgis::make_unique< Layer >( provider, layerName, arrangement, defaultPriority, active, toLabel, this, displayAll );
   Layer *res = layer.get();
-  mLayers.insert( { provider, std::move( layer ) } );
+  mLayers.insert( std::pair<QgsAbstractLabelProvider *, std::unique_ptr< Layer >>( provider, std::move( layer ) ) );
   mMutex.unlock();
 
   return res;