diff --git a/mmdebstrap b/mmdebstrap
index e066843..79ae51d 100755
--- a/mmdebstrap
+++ b/mmdebstrap
@@ -7848,7 +7848,7 @@ Limitations in comparison to debootstrap:
 =item * Some debootstrap options don't exist, namely:
 
 I<--second-stage>, I<--exclude>, I<--resolve-deps>, I<--force-check-gpg>,
-I<--merged-usr> and I<--no-merged-usr>
+I<--merged-usr>, I<--no-merged-usr> and I<--cache-dir>.
 
 =back