diff --git a/mayan/apps/common/warnings.py b/mayan/apps/common/warnings.py
new file mode 100644
index 0000000000..5365974f3e
--- /dev/null
+++ b/mayan/apps/common/warnings.py
@@ -0,0 +1,7 @@
+from __future__ import absolute_import
+
+
+class InterfaceWarning(UserWarning):
+    """
+    Warning when using obsolete internal interfaces
+    """