diff --git a/docs/sly.rst b/docs/sly.rst
index 8ee47a0..4a2affe 100644
--- a/docs/sly.rst
+++ b/docs/sly.rst
@@ -301,13 +301,11 @@ column information as a separate step.  For instance, you can search
 backwards until you reach the previous newline::
 
     # Compute column.
-    #     input is the input text string
+    #     text is the input text string
     #     token is a token instance
     def find_column(text, token):
         last_cr = text.rfind('\n', 0, token.index)
-        if last_cr < 0:
-            last_cr = 0
-        column = (token.index - last_cr) + 1
+        column = token.index - last_cr
         return column
 
 Since column information is often only useful in the context of error