Index: defaulttags.py
===================================================================
--- defaulttags.py	(revision 12773)
+++ defaulttags.py	(working copy)
@@ -274,12 +274,13 @@
 
 class SsiNode(Node):
     def __init__(self, filepath, parsed):
-        self.filepath, self.parsed = filepath, parsed
+        self.filepath, self.parsed = Variable(filepath), parsed
 
     def render(self, context):
+        self.filepath = self.filepath.resolve(context)
         if not include_is_allowed(self.filepath):
             if settings.DEBUG:
-                return "[Didn't have permission to include file]"
+                return "[Didn't have permission to include file, %s]" % self.filepath
             else:
                 return '' # Fail silently for invalid includes.
         try: