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-rw-r--r--lib/sqlalchemy/dialects/mssql/base.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/sqlalchemy/dialects/mssql/base.py b/lib/sqlalchemy/dialects/mssql/base.py
index bd41c19bf..6670a28bd 100644
--- a/lib/sqlalchemy/dialects/mssql/base.py
+++ b/lib/sqlalchemy/dialects/mssql/base.py
@@ -1772,7 +1772,7 @@ class MSDialect(default.DefaultDialect):
MSNText, MSBinary, MSVarBinary,
sqltypes.LargeBinary):
if charlen == -1:
- charlen = 'max'
+ charlen = None
kwargs['length'] = charlen
if collation:
kwargs['collation'] = collation