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-rw-r--r--lib/sqlalchemy/databases/mssql.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/sqlalchemy/databases/mssql.py b/lib/sqlalchemy/databases/mssql.py
index 923e85cea..b254941ab 100644
--- a/lib/sqlalchemy/databases/mssql.py
+++ b/lib/sqlalchemy/databases/mssql.py
@@ -69,7 +69,7 @@ class MSNumeric(sqltypes.Numeric):
# Not sure that this exception is needed
return value
else:
- if value._exp < 6:
+ if not isinstance(value, float) and value._exp < -6:
value = ((value < 0 and '-' or '')
+ '0.'
+ '0' * -(value._exp+1)