diff --git a/src/state.h b/src/state.h
index 8fd9088a..a087dc83 100644
--- a/src/state.h
+++ b/src/state.h
@@ -67,7 +67,10 @@
    Conflict resolution can decide that certain tokens in certain
    states should explicitly be errors (for implementing %nonassoc).
    For each state, the tokens that are errors for this reason are
-   recorded in an errs structure, which holds the token numbers.
+   recorded in an errs structure.  The generated parser does not
+   depend on this errs structure, it is used only in the reports
+   (*.output, etc.) to describe conflicted actions that have been
+   discarded.
 
    There is at least one goto transition present in state zero.  It
    leads to a next-to-final state whose accessing_symbol is the