diff --git a/pecan/debug.py b/pecan/debug.py
index 1c4a8c8..a465c21 100644
--- a/pecan/debug.py
+++ b/pecan/debug.py
@@ -122,7 +122,7 @@ class DebugMiddleware(object):
 
     def __call__(self, environ, start_response):
         assert not environ['wsgi.multiprocess'], (
-            "The EvalException middleware is not usable in a "
+            "The DebugMiddleware middleware is not usable in a "
             "multi-process environment")
         try:
             return self.app(environ, start_response)