diff --git a/pcbnew/exporters/step/step_pcb_model.cpp b/pcbnew/exporters/step/step_pcb_model.cpp
index 01d8ce2531..7ce111d9e5 100644
--- a/pcbnew/exporters/step/step_pcb_model.cpp
+++ b/pcbnew/exporters/step/step_pcb_model.cpp
@@ -673,10 +673,13 @@ static TopoDS_Compound makeCompound( auto& aInputShapes )
 
 
 // Try to fuse shapes. If that fails, just add them to a compound
-static TopoDS_Shape fuseShapesOrCompound( auto& aInputShapes )
+static TopoDS_Shape fuseShapesOrCompound( TopTools_ListOfShape& aInputShapes )
 {
     TopoDS_Shape outShape;
 
+    if( aInputShapes.Size() == 1 )
+        return aInputShapes.First();
+
     if( fuseShapes( aInputShapes, outShape ) )
         return outShape;