diff --git a/Documentation/git-gc.txt b/Documentation/git-gc.txt
index c20ee6c789..8a5df51641 100644
--- a/Documentation/git-gc.txt
+++ b/Documentation/git-gc.txt
@@ -76,7 +76,7 @@ be performed as well.
 --prune=<date>::
 	Prune loose objects older than date (default is 2 weeks ago,
 	overridable by the config variable `gc.pruneExpire`).
-	--prune=all prunes loose objects regardless of their age and
+	--prune=now prunes loose objects regardless of their age and
 	increases the risk of corruption if another process is writing to
 	the repository concurrently; see "NOTES" below. --prune is on by
 	default.