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-rw-r--r--docs/ref/contrib/postgres/functions.txt2
1 files changed, 2 insertions, 0 deletions
diff --git a/docs/ref/contrib/postgres/functions.txt b/docs/ref/contrib/postgres/functions.txt
index 8d3df51864..171272c518 100644
--- a/docs/ref/contrib/postgres/functions.txt
+++ b/docs/ref/contrib/postgres/functions.txt
@@ -16,6 +16,8 @@ All of these functions are available from the
Returns a version 4 UUID.
+Requires PostgreSQL 9.4 or greater.
+
The `pgcrypto extension`_ must be installed. You can use the
:class:`~django.contrib.postgres.operations.CryptoExtension` migration
operation to install it.