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-rw-r--r--lib/sqlalchemy/sql/dml.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/sqlalchemy/sql/dml.py b/lib/sqlalchemy/sql/dml.py
index 854b894ee..098f2d584 100644
--- a/lib/sqlalchemy/sql/dml.py
+++ b/lib/sqlalchemy/sql/dml.py
@@ -37,6 +37,7 @@ class UpdateBase(DialectKWArgs, HasPrefixes, Executable, ClauseElement):
return p
if isinstance(parameters, (list, tuple)) and \
+ parameters and \
isinstance(parameters[0], (list, tuple, dict)):
if not self._supports_multi_parameters: