diff --git a/docs/source/usersguide/decay_sources.rst b/docs/source/usersguide/decay_sources.rst
index a228f8e66b..d5a078135b 100644
--- a/docs/source/usersguide/decay_sources.rst
+++ b/docs/source/usersguide/decay_sources.rst
@@ -88,5 +88,5 @@ relevant tallies. This can be done with the aid of the
         dose_tally = sp.get_tally(name='dose tally')
 
     # Apply time correction factors
-    tally = d1s.apply_time_correction(tally, factors, time_index)
+    tally = d1s.apply_time_correction(dose_tally, factors, time_index)