diff --git a/plugins/LegacyProfileReader/DictionaryOfDoom.json b/plugins/LegacyProfileReader/DictionaryOfDoom.json
index 10b4a1ad6f..b14994b1c1 100644
--- a/plugins/LegacyProfileReader/DictionaryOfDoom.json
+++ b/plugins/LegacyProfileReader/DictionaryOfDoom.json
@@ -12,7 +12,7 @@
         "bottom_thickness": "0 if (solid_bottom == \"False\") else solid_layer_thickness",
         "infill_sparse_density": "fill_density",
         "infill_overlap": "fill_overlap",
-        "infill_before_walls": "perimeter_before_infill",
+        "infill_before_walls": "False if (perimeter_before_infill == \"True\") else True",
         "material_print_temperature": "print_temperature",
         "material_bed_temperature": "print_bed_temperature",
         "material_diameter": "filament_diameter",