diff --git a/offlineimap/ui/Curses.py b/offlineimap/ui/Curses.py
index 986a44a..198b290 100644
--- a/offlineimap/ui/Curses.py
+++ b/offlineimap/ui/Curses.py
@@ -211,6 +211,7 @@ class CursesThreadFrame:
     def setcolor(self, color, modifier=0):
         """Draw the thread symbol '@' in the specified color
 
+        :param color: Curses colorname
         :param modifier: Curses modified, such as curses.A_BOLD
         """