Showing with 6 additions and 0 deletions.

+6 −0 src/core/qgsgeometry.cpp
diff --git a/src/core/qgsgeometry.cpp b/src/core/qgsgeometry.cpp
@@ -5221,6 +5221,12 @@ bool QgsGeometry::exportGeosToWkb() const
 
 bool QgsGeometry::convertToMultiType()
 {
+  // TODO: implement with GEOS
+  if ( mDirtyWkb )
+  {
+    exportGeosToWkb();
+  }
+
   if ( !mGeometry )
   {
     return false;