diff --git a/src/sixtypical/callgraph.py b/src/sixtypical/callgraph.py
index 8f7afce..745a17d 100644
--- a/src/sixtypical/callgraph.py
+++ b/src/sixtypical/callgraph.py
@@ -35,7 +35,7 @@ def construct_callgraph(program):
             'potentially-calls': potentially_calls,
         }
 
-    # Reflexive closure
+    # Symmetric closure
     # (Note, this information isn't used anywhere yet)
 
     for routine in program.routines: