diff --git a/sourcecodebrowser/plugin.py b/sourcecodebrowser/plugin.py
index 19123fc..3bc886a 100644
--- a/sourcecodebrowser/plugin.py
+++ b/sourcecodebrowser/plugin.py
@@ -15,7 +15,7 @@ class SourceTree(Gtk.VBox):
     """
     Source Tree Widget
     
-    A treeview storing the heirarchy of source code symbols within a particular
+    A treeview storing the hierarchy of source code symbols within a particular
     document. Requries exhuberant-ctags.
     """
     __gsignals__ = {