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-rw-r--r--django/db/backends/schema.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/django/db/backends/schema.py b/django/db/backends/schema.py
index 154f452967..64ba5b0740 100644
--- a/django/db/backends/schema.py
+++ b/django/db/backends/schema.py
@@ -613,7 +613,7 @@ class BaseDatabaseSchemaEditor(object):
# directly run a (NOT) NULL alteration
actions = actions + null_actions
# Combine actions together if we can (e.g. postgres)
- if self.connection.features.supports_combined_alters:
+ if self.connection.features.supports_combined_alters and actions:
sql, params = tuple(zip(*actions))
actions = [(", ".join(sql), reduce(operator.add, params))]
# Apply those actions