--- a/eric6/Debugger/CallStackViewer.py	Wed Jan 29 19:38:13 2020 +0100
+++ b/eric6/Debugger/CallStackViewer.py	Thu Jan 30 19:37:03 2020 +0100
@@ -105,6 +105,7 @@
         
         @param stack list of tuples with call stack data (file name,
             line number, function name, formatted argument/values list)
+        @type list of tuples of (str, str, str, str)
         """
         self.clear()
         for fname, fline, ffunc, fargs in stack: