diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy
index a4afe5edc90..c1c624b16fc 100644
--- a/sql/sql_yacc.yy
+++ b/sql/sql_yacc.yy
@@ -729,7 +729,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, size_t *yystacksize);
 %token  <kwd>  ELSIF_MARIADB_SYM             // PLSQL-R
 %token  <kwd>  EXCEPTION_ORACLE_SYM          // SQL-2003-N, PLSQL-R
 %token  <kwd>  GOTO_MARIADB_SYM              // Oracle-R
-%token  <kwd>  NOCOPY_SYM
+%token  <kwd>  NOCOPY_SYM                    // PLSQL-N
 %token  <kwd>  OTHERS_MARIADB_SYM            // SQL-2011-N, PLSQL-R
 %token  <kwd>  PACKAGE_MARIADB_SYM           // Oracle-R
 %token  <kwd>  RAISE_MARIADB_SYM             // PLSQL-R