diff --git a/source/administration/envelope-storage.rst b/source/administration/envelope-storage.rst
index fb907a6b44cf9c77a77963a60ff09e5e9025ac2c_c291cmNlL2FkbWluaXN0cmF0aW9uL2VudmVsb3BlLXN0b3JhZ2UucnN0..f6c6c5e129524b4afef1d6ae43bc9df7affd438d_c291cmNlL2FkbWluaXN0cmF0aW9uL2VudmVsb3BlLXN0b3JhZ2UucnN0 100644
--- a/source/administration/envelope-storage.rst
+++ b/source/administration/envelope-storage.rst
@@ -67,7 +67,7 @@
     Enable the cache
 
 ``storage.envelope.cache.max-size``
-    (default "1G") Set the cache size
+    (default ``1073741824`` (ie 1GiB)) Set the cache size, in bytes.
 
 Metrics
 -------