diff --git a/plugins/XmlMaterialProfile/XmlMaterialProfile.py b/plugins/XmlMaterialProfile/XmlMaterialProfile.py
index b6b3e0671c..7f41fac0c5 100644
--- a/plugins/XmlMaterialProfile/XmlMaterialProfile.py
+++ b/plugins/XmlMaterialProfile/XmlMaterialProfile.py
@@ -8,7 +8,6 @@ import xml.etree.ElementTree as ET
 
 from UM.Resources import Resources
 from UM.Logger import Logger
-from UM.Util import parseBool
 from cura.CuraApplication import CuraApplication
 
 import UM.Dictionary
@@ -485,7 +484,7 @@ class XmlMaterialProfile(InstanceContainer):
                 common_setting_values[self.__material_settings_setting_map[key]] = entry.text
             elif key in self.__unmapped_settings:
                 if key == "hardware compatible":
-                    common_compatibility = parseBool(entry.text)
+                    common_compatibility = self._parseCompatibleValue(entry.text)
             else:
                 Logger.log("d", "Unsupported material setting %s", key)
         self._cached_values = common_setting_values # from InstanceContainer ancestor
@@ -505,7 +504,7 @@ class XmlMaterialProfile(InstanceContainer):
                     machine_setting_values[self.__material_settings_setting_map[key]] = entry.text
                 elif key in self.__unmapped_settings:
                     if key == "hardware compatible":
-                        machine_compatibility = parseBool(entry.text)
+                        machine_compatibility = self._parseCompatibleValue(entry.text)
                 else:
                     Logger.log("d", "Unsupported material setting %s", key)
 
@@ -568,7 +567,7 @@ class XmlMaterialProfile(InstanceContainer):
                             hotend_setting_values[self.__material_settings_setting_map[key]] = entry.text
                         elif key in self.__unmapped_settings:
                             if key == "hardware compatible":
-                                hotend_compatibility = parseBool(entry.text)
+                                hotend_compatibility = self._parseCompatibleValue(entry.text)
                         else:
                             Logger.log("d", "Unsupported material setting %s", key)
 
@@ -609,6 +608,10 @@ class XmlMaterialProfile(InstanceContainer):
         else:
             return material_name
 
+    ##  Parse the value of the "material compatible" property.
+    def _parseCompatibleValue(self, value: str):
+        return value in {"yes", "unknown"}
+
     # Map XML file setting names to internal names
     __material_settings_setting_map = {
         "print temperature": "default_material_print_temperature",
@@ -670,4 +673,4 @@ def _indent(elem, level = 0):
 # We are only interested in the actual tag name, so discard everything
 # before the last }
 def _tag_without_namespace(element):
-    return element.tag[element.tag.rfind("}") + 1:]
+    return element.tag[element.tag.rfind("}") + 1:]
\ No newline at end of file