diff --git a/docs/cmdline-opts/max-filesize.md b/docs/cmdline-opts/max-filesize.md
index 998359cf74..cf2ac65376 100644
--- a/docs/cmdline-opts/max-filesize.md
+++ b/docs/cmdline-opts/max-filesize.md
@@ -16,9 +16,11 @@ Example:
 
 # `--max-filesize`
 
-Specify the maximum size (in bytes) of a file to download. If the file
-requested is larger than this value, the transfer does not start and curl
-returns with exit code 63.
+When set to a non-zero value, it specifies the maximum size (in bytes) of a
+file to download. If the file requested is larger than this value, the
+transfer does not start and curl returns with exit code 63.
+
+Setting the maximum value to zero disables the limit.
 
 A size modifier may be used. For example, Appending 'k' or 'K' counts the
 number as kilobytes, 'm' or 'M' makes it megabytes, while 'g' or 'G' makes it