diff --git a/segpy/ext/__init__.py b/segpy/ext/__init__.py
index 61ad851..ba891c3 100644
--- a/segpy/ext/__init__.py
+++ b/segpy/ext/__init__.py
@@ -4,6 +4,11 @@ loaded = set()
 
 
 def load_entry_points(name=None):
+    """Load extension packages into the segpy.ext namespace.
+
+    Any packages registered against the 'segpy.ext' entry-point group will be
+    installed dynamically into the segpy.ext namespace.
+    """
     for entry_point in pkg_resources.iter_entry_points(group='segpy.ext', name=name):
         package = entry_point.load()
         if package not in loaded: