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-rw-r--r--sql/unireg.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/sql/unireg.h b/sql/unireg.h
index 2cfa709bbdc..eec89fcee0f 100644
--- a/sql/unireg.h
+++ b/sql/unireg.h
@@ -49,7 +49,7 @@
#define MAX_SYS_VAR_LENGTH 32
#define MAX_KEY 32 /* Max used keys */
#define MAX_REF_PARTS 16 /* Max parts used as ref */
-#define MAX_KEY_LENGTH 500 /* max possible key */
+#define MAX_KEY_LENGTH 1024 /* max possible key */
#if SIZEOF_OFF_T > 4
#define MAX_REFLENGTH 8 /* Max length for record ref */
#else