diff --git a/cura/CuraPackageManager.py b/cura/CuraPackageManager.py
index fcbf5f6ea6..535d331a62 100644
--- a/cura/CuraPackageManager.py
+++ b/cura/CuraPackageManager.py
@@ -20,12 +20,12 @@ class CuraPackageManager(PackageManager):
     def __init__(self, application: "QtApplication", parent: Optional["QObject"] = None) -> None:
         super().__init__(application, parent)
         self._local_packages: Optional[List[Dict[str, Any]]] = None
-        self._local_packages_id: Optional[Set[str]] = None
+        self._local_packages_ids: Optional[Set[str]] = None
         self.installedPackagesChanged.connect(self._updateLocalPackages)
 
     def _updateLocalPackages(self) -> None:
         self._local_packages = self.getAllLocalPackages()
-        self._local_packages_id = set(pkg["package_id"] for pkg in self._local_packages)
+        self._local_packages_ids = set(pkg["package_id"] for pkg in self._local_packages)
 
     @property
     def local_packages(self) -> List[Dict[str, Any]]:
@@ -37,13 +37,13 @@ class CuraPackageManager(PackageManager):
         return cast(List[Dict[str, Any]], self._local_packages)
 
     @property
-    def local_packages_id(self) -> Set[str]:
+    def local_packages_ids(self) -> Set[str]:
         """locally installed packages, lazy execution"""
-        if self._local_packages_id is None:
+        if self._local_packages_ids is None:
             self._updateLocalPackages()
             # _updateLocalPackages always results in a list of packages, not None.
             # It's guaranteed to be a list now.
-        return cast(Set[str], self._local_packages_id)
+        return cast(Set[str], self._local_packages_ids)
 
     def initialize(self) -> None:
         self._installation_dirs_dict["materials"] = Resources.getStoragePath(CuraApplication.ResourceTypes.MaterialInstanceContainer)
diff --git a/plugins/Marketplace/PackageModel.py b/plugins/Marketplace/PackageModel.py
index de2732f147..0e808dd369 100644
--- a/plugins/Marketplace/PackageModel.py
+++ b/plugins/Marketplace/PackageModel.py
@@ -353,7 +353,7 @@ class PackageModel(QObject):
 
     @pyqtProperty(bool, notify = stateManageButtonChanged)
     def isInstalled(self) -> bool:
-        return self._package_id in self._package_manager.local_packages_id
+        return self._package_id in self._package_manager.local_packages_ids
 
     @pyqtProperty(bool, notify = stateManageButtonChanged)
     def isActive(self) -> bool: