diff --git a/documentation/migration-guides/migration-5.2.rst b/documentation/migration-guides/migration-5.2.rst
index 73d52460fd..7b35e7721f 100644
--- a/documentation/migration-guides/migration-5.2.rst
+++ b/documentation/migration-guides/migration-5.2.rst
@@ -57,3 +57,6 @@ The following classes have been removed in this release:
 
 Miscellaneous changes
 ~~~~~~~~~~~~~~~~~~~~~
+
+-  :term:`ZSTD_COMPRESSION_LEVEL` is now a plain integer number instead of a dash-prefixed
+   command-line option (e.g. it should be set to ``3`` rather than ``-3``).