diff --git a/InvenTree/InvenTree/api.py b/InvenTree/InvenTree/api.py
index 0180ad22b5..afd4d91de1 100644
--- a/InvenTree/InvenTree/api.py
+++ b/InvenTree/InvenTree/api.py
@@ -70,86 +70,7 @@ class AttachmentMixin:
         attachment = serializer.save()
         attachment.user = self.request.user
         attachment.save()
-
-
-class RolePermission(permissions.BasePermission):
-    """
-    Role mixin for API endpoints, allowing us to specify the user "role"
-    which is required for certain operations.
-
-    Each endpoint can have one or more of the following actions:
-    - GET
-    - POST
-    - PUT
-    - PATCH
-    - DELETE
-    
-    Specify the required "role" using the role_required attribute.
-
-    e.g.
-
-    role_required = "part"
-
-    The RoleMixin class will then determine if the user has the required permission
-    to perform the specified action.
-
-    For example, a DELETE action will be rejected unless the user has the "part.remove" permission
-
-    """
-
-    def has_permission(self, request, view):
-        """
-        Determine if the current user has the specified permissions
-        """
-
-        # First, check that the user is authenticated!
-        auth = permissions.IsAuthenticated()
-
-        if not auth.has_permission(request, view):
-            return False
-
-        user = request.user
-
-        # Superuser can do it all
-        if False and user.is_superuser:
-            return True
-
-        # Map the request method to a permission type
-        rolemap = {
-            'GET': 'view',
-            'OPTIONS': 'view',
-            'POST': 'add',
-            'PUT': 'change',
-            'PATCH': 'change',
-            'DELETE': 'delete',
-        }
-
-        permission = rolemap[request.method]
-
-        role = getattr(view, 'role_required', None)
-
-        if not role:
-            raise AttributeError(f"'role_required' not specified for view {type(view).__name__}")
         
-        roles = []
-
-        if type(role) is str:
-            roles = [role]
-        elif type(role) in [list, tuple]:
-            roles = role
-        else:
-            raise TypeError(f"'role_required' is of incorrect type ({type(role)}) for view {type(view).__name__}")
-
-        for role in roles:
-            
-            if role not in RuleSet.RULESET_NAMES:
-                raise ValueError(f"Role '{role}' is not a valid role")
-
-            if not check_user_role(user, role, permission):
-                return False
-
-        # All checks passed
-        return True
 
 class ActionPluginView(APIView):
     """
diff --git a/InvenTree/InvenTree/permissions.py b/InvenTree/InvenTree/permissions.py
new file mode 100644
index 0000000000..daa57136b3
--- /dev/null
+++ b/InvenTree/InvenTree/permissions.py
@@ -0,0 +1,86 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from rest_framework import permissions
+
+import users.models
+
+
+class RolePermission(permissions.BasePermission):
+    """
+    Role mixin for API endpoints, allowing us to specify the user "role"
+    which is required for certain operations.
+
+    Each endpoint can have one or more of the following actions:
+    - GET
+    - POST
+    - PUT
+    - PATCH
+    - DELETE
+    
+    Specify the required "role" using the role_required attribute.
+
+    e.g.
+
+    role_required = "part"
+
+    The RoleMixin class will then determine if the user has the required permission
+    to perform the specified action.
+
+    For example, a DELETE action will be rejected unless the user has the "part.remove" permission
+
+    """
+
+    def has_permission(self, request, view):
+        """
+        Determine if the current user has the specified permissions
+        """
+
+        # First, check that the user is authenticated!
+        auth = permissions.IsAuthenticated()
+
+        if not auth.has_permission(request, view):
+            return False
+
+        user = request.user
+
+        # Superuser can do it all
+        if False and user.is_superuser:
+            return True
+
+        # Map the request method to a permission type
+        rolemap = {
+            'GET': 'view',
+            'OPTIONS': 'view',
+            'POST': 'add',
+            'PUT': 'change',
+            'PATCH': 'change',
+            'DELETE': 'delete',
+        }
+
+        permission = rolemap[request.method]
+
+        role = getattr(view, 'role_required', None)
+
+        if not role:
+            raise AttributeError(f"'role_required' not specified for view {type(view).__name__}")
+        
+        roles = []
+
+        if type(role) is str:
+            roles = [role]
+        elif type(role) in [list, tuple]:
+            roles = role
+        else:
+            raise TypeError(f"'role_required' is of incorrect type ({type(role)}) for view {type(view).__name__}")
+
+        for role in roles:
+            
+            if role not in users.models.RuleSet.RULESET_NAMES:
+                raise ValueError(f"Role '{role}' is not a valid role")
+
+            if not users.models.check_user_role(user, role, permission):
+                return False
+
+        # All checks passed
+        return True
\ No newline at end of file
diff --git a/InvenTree/InvenTree/settings.py b/InvenTree/InvenTree/settings.py
index 70760624c6..5dbfb845bc 100644
--- a/InvenTree/InvenTree/settings.py
+++ b/InvenTree/InvenTree/settings.py
@@ -278,6 +278,7 @@ REST_FRAMEWORK = {
     'DEFAULT_PERMISSION_CLASSES': (
         'rest_framework.permissions.IsAuthenticated',
         'rest_framework.permissions.DjangoModelPermissions',
+        'InvenTree.permissions.RolePermission',
     ),
     'DEFAULT_SCHEMA_CLASS': 'rest_framework.schemas.coreapi.AutoSchema'
 }
diff --git a/InvenTree/part/api.py b/InvenTree/part/api.py
index ded9a64cbb..71e1d63314 100644
--- a/InvenTree/part/api.py
+++ b/InvenTree/part/api.py
@@ -29,7 +29,7 @@ from . import serializers as part_serializers
 
 from InvenTree.views import TreeSerializer
 from InvenTree.helpers import str2bool, isNull
-from InvenTree.api import AttachmentMixin, RolePermission
+from InvenTree.api import AttachmentMixin
 
 from InvenTree.status_codes import BuildStatus
 
@@ -108,10 +108,6 @@ class CategoryList(generics.ListCreateAPIView):
 
     role_required = 'part'
 
-    permission_classes = [
-        RolePermission,
-    ]
-
 
 class CategoryDetail(generics.RetrieveUpdateDestroyAPIView):
     """ API endpoint for detail view of a single PartCategory object """