diff --git a/innobase/row/row0mysql.c b/innobase/row/row0mysql.c
index 1ab7bb1deb0..a915200161f 100644
--- a/innobase/row/row0mysql.c
+++ b/innobase/row/row0mysql.c
@@ -399,7 +399,7 @@ row_create_prebuilt(
 	prebuilt->sel_graph = NULL;
 
 	prebuilt->search_tuple = dtuple_create(heap,
-						dict_table_get_n_cols(table));
+					2 * dict_table_get_n_cols(table));
 	
 	clust_index = dict_table_get_first_index(table);