diff --git a/docs/Manpage.md b/docs/Manpage.md
index cc4dfef347..08c2988b0d 100644
--- a/docs/Manpage.md
+++ b/docs/Manpage.md
@@ -4283,6 +4283,11 @@ command execution e.g. `$(cat file)`.
 
 : If set, pass `--greedy` to all cask upgrade commands.
 
+`HOMEBREW_UPGRADE_GREEDY_CASKS`
+
+: A space-separated list of casks. Homebrew will act as if `--greedy` was passed
+  when upgrading any cask on this list.
+
 `HOMEBREW_VERBOSE`
 
 : If set, always assume `--verbose` when running commands.
diff --git a/manpages/brew.1 b/manpages/brew.1
index 92da0cabe2..0b0ddd990c 100644
--- a/manpages/brew.1
+++ b/manpages/brew.1
@@ -2808,6 +2808,9 @@ If set, always use the latest stable tag (even if developer commands have been r
 \fBHOMEBREW_UPGRADE_GREEDY\fP
 If set, pass \fB\-\-greedy\fP to all cask upgrade commands\.
 .TP
+\fBHOMEBREW_UPGRADE_GREEDY_CASKS\fP
+A space\-separated list of casks\. Homebrew will act as if \fB\-\-greedy\fP was passed when upgrading any cask on this list\.
+.TP
 \fBHOMEBREW_VERBOSE\fP
 If set, always assume \fB\-\-verbose\fP when running commands\.
 .TP