diff --git a/doc/cabal-project.rst b/doc/cabal-project.rst
index 2e47dfdc53caa821f73eaba69f6219bbba367b2d..de8451bedc7d0c31009f4c372915cfd44b81fba3 100644
--- a/doc/cabal-project.rst
+++ b/doc/cabal-project.rst
@@ -1747,7 +1747,7 @@ Most users generally won't need these.
                --prefer-oldest
                --no-prefer-oldest
     :synopsis: Prefer the oldest versions of packages available.
-    :since:    3.8
+    :since:    3.10
 
     :default:  False