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diff --git a/Docs/manual.texi b/Docs/manual.texi
index 3875bfd0646..e655c0c9a67 100644
--- a/Docs/manual.texi
+++ b/Docs/manual.texi
@@ -36607,7 +36607,7 @@ deleted due to duplication of unique key values.
The @code{FOREIGN KEY}, @code{CHECK}, and @code{REFERENCES} clauses don't
actually do anything, except for InnoDB type tables which support
@code{ADD CONSTRAINT FOREIGN KEY (...) REFERENCES ... (...)}.
-Note that InnoDB does not allow a constraint @code{symbol} or @code{index_name}
+Note that InnoDB does not allow an @code{index_name}
to be specified. @xref{InnoDB}.
The syntax for other table types is provided only for compatibility,
to make it easier to port code from other SQL servers and to run applications