diff --git a/src/initialization/InitElement.cpp b/src/initialization/InitElement.cpp
index 0d19969f3..c3bb62959 100644
--- a/src/initialization/InitElement.cpp
+++ b/src/initialization/InitElement.cpp
@@ -433,8 +433,8 @@ namespace detail
             // pp_element.getWithParser("aperture_x", aperture_x);
             // pp_element.getWithParser("aperture_y", aperture_y);
             // Backwards compatibility to ImpactX <= 25.01
-            bool const has_old_xmax = pp_element.queryAddWithParser("xmax", aperture_x);
-            bool const has_old_ymax = pp_element.queryAddWithParser("ymax", aperture_y);
+            bool const has_old_xmax = pp_element.queryWithParser("xmax", aperture_x);
+            bool const has_old_ymax = pp_element.queryWithParser("ymax", aperture_y);
             if (has_old_xmax) {
                 pp_element.queryAddWithParser("aperture_x", aperture_x);
                 ablastr::warn_manager::WMRecordWarning(