diff --git a/docs/source/history.rst b/docs/source/history.rst
index 1ad4b1e..a557d72 100644
--- a/docs/source/history.rst
+++ b/docs/source/history.rst
@@ -2,6 +2,11 @@
  History
 =========
 
+dev
+
+  - Ignore AssertionError exceptions generated when plugins are
+    loaded.
+
 0.7.2
 
   - Fix logging support for Python 2.6.
diff --git a/stevedore/extension.py b/stevedore/extension.py
index e4794a4..4f9bee8 100644
--- a/stevedore/extension.py
+++ b/stevedore/extension.py
@@ -76,7 +76,7 @@ class ExtensionManager(object):
                                             )
                 if ext:
                     extensions.append(ext)
-            except KeyboardInterrupt:
+            except (KeyboardInterrupt, AssertionError):
                 raise
             except Exception as err:
                 LOG.error('Could not load %r: %s', ep.name, err)