diff --git a/src/core/painting/qgsgeometrypaintdevice.cpp b/src/core/painting/qgsgeometrypaintdevice.cpp
index 9d343b0a3a42..44d213daf017 100644
--- a/src/core/painting/qgsgeometrypaintdevice.cpp
+++ b/src/core/painting/qgsgeometrypaintdevice.cpp
@@ -502,10 +502,10 @@ void QgsGeometryPaintEngine::addSubpathGeometries( const QPainterPath &path, con
   if ( queuedPolygons.empty() )
     return;
 
-  mGeometry.reserve( mGeometry.numGeometries() + queuedPolygons.size() );
+  mGeometry.reserve( static_cast< int >( mGeometry.numGeometries() + queuedPolygons.size() ) );
 
   QgsMultiPolygon tempMultiPolygon;
-  tempMultiPolygon.reserve( queuedPolygons.size() );
+  tempMultiPolygon.reserve( static_cast< int >( queuedPolygons.size() ) );
   for ( auto &part : queuedPolygons )
   {
     tempMultiPolygon.addGeometry( part.release() );
diff --git a/src/core/painting/qgsgeometrypaintdevice.h b/src/core/painting/qgsgeometrypaintdevice.h
index 8da977b11fac..9c1e6bcb7c57 100644
--- a/src/core/painting/qgsgeometrypaintdevice.h
+++ b/src/core/painting/qgsgeometrypaintdevice.h
@@ -92,7 +92,7 @@ class QgsGeometryPaintEngine: public QPaintEngine
     bool mUsePathStroker = false;
     QPen mPen;
     QgsGeometryCollection mGeometry;
-    int mStrokedPathsSegments = 8;
+    static constexpr int mStrokedPathsSegments = 8;
 };
 
 #endif