diff --git a/src/ploneintranet/workspace/workspacecontainer.py b/src/ploneintranet/workspace/workspacecontainer.py
index <HASH>..<HASH> 100644
--- a/src/ploneintranet/workspace/workspacecontainer.py
+++ b/src/ploneintranet/workspace/workspacecontainer.py
@@ -15,3 +15,12 @@ class WorkspaceContainer(Container):
     A folder to contain WorkspaceFolders
     """
     grok.implements(IWorkspaceContainer)
+
+try:
+    from ploneintranet.attachments.attachments import IAttachmentStoragable
+except ImportError:
+    IAttachmentStoragable = None
+
+if IAttachmentStoragable is not None:
+    from zope import interface
+    interface.classImplements(WorkspaceContainer, IAttachmentStoragable)
also allow temporary attachments on WorkspaceContainer