diff --git a/source/blender/functions/intern/field.cc b/source/blender/functions/intern/field.cc
index 19539a7821e..9a97acb2daa 100644
--- a/source/blender/functions/intern/field.cc
+++ b/source/blender/functions/intern/field.cc
@@ -774,7 +774,7 @@ int FieldEvaluator::add(GField field)
 
 static IndexMask evaluate_selection(const Field<bool> &selection_field,
                                     const FieldContext &context,
-                                    IndexMask full_mask,
+                                    const IndexMask &full_mask,
                                     ResourceScope &scope)
 {
   if (selection_field) {