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-rw-r--r--sql/sql_explain.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/sql/sql_explain.h b/sql/sql_explain.h
index 88fae9d4f1a..7281f2c966f 100644
--- a/sql/sql_explain.h
+++ b/sql/sql_explain.h
@@ -54,6 +54,8 @@ it into the slow query log.
#ifndef SQL_EXPLAIN_INCLUDED
#define SQL_EXPLAIN_INCLUDED
+class select_result_sink;
+
class String_list: public List<char>
{
public: