diff --git a/ddl/ddl.go b/ddl/ddl.go
index fe4c42713e..b4f44866a2 100644
--- a/ddl/ddl.go
+++ b/ddl/ddl.go
@@ -80,7 +80,7 @@ var (
 		"unsupported drop integer primary key")
 	errUnsupportedCharset = terror.ClassDDL.New(codeUnsupportedCharset, "unsupported charset %s collate %s")
 
-	errBlobKeyWithoutLength = terror.ClassDDL.New(codeBlobKeyWithoutLength, "index for BLOB/TEXT column must specificate a key length")
+	errBlobKeyWithoutLength = terror.ClassDDL.New(codeBlobKeyWithoutLength, "index for BLOB/TEXT column must specify a key length")
 	errIncorrectPrefixKey   = terror.ClassDDL.New(codeIncorrectPrefixKey, "Incorrect prefix key; the used key part isn't a string, the used length is longer than the key part, or the storage engine doesn't support unique prefix keys")
 	errTooLongKey           = terror.ClassDDL.New(codeTooLongKey,
 		fmt.Sprintf("Specified key was too long; max key length is %d bytes", maxPrefixLength))