diff --git a/docs/Manpage.md b/docs/Manpage.md
index 914f583fbf..d6f81a2978 100644
--- a/docs/Manpage.md
+++ b/docs/Manpage.md
@@ -2289,7 +2289,7 @@ example, run `export HOMEBREW_NO_INSECURE_REDIRECT=1` rather than just
   <br>If set, do not install formulae and casks in homebrew/core and homebrew/cask taps using Homebrew's API and instead use (large, slow) local checkouts of these repositories.
 
 - `HOMEBREW_NO_INSTALL_UPGRADE`
-  <br>If set, `brew install` *`formula`* will not upgrade *`formula`* if it is installed but outdated.
+  <br>If set, `brew install` <formula/cask> will not upgrade <formula/cask> if it is installed but outdated.
 
 - `HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK`
   <br>If set, do not check for broken linkage of dependents or outdated dependents after installing, upgrading or reinstalling formulae. This will result in fewer dependents (and their dependencies) being upgraded or reinstalled but may result in more breakage from running `brew install` *`formula`* or `brew upgrade` *`formula`*.
diff --git a/manpages/brew.1 b/manpages/brew.1
index 8ab9a71176..4ea95fcf13 100644
--- a/manpages/brew.1
+++ b/manpages/brew.1
@@ -3369,7 +3369,7 @@ If set, do not install formulae and casks in homebrew/core and homebrew/cask tap
 \fBHOMEBREW_NO_INSTALL_UPGRADE\fR
 .
 .br
-If set, \fBbrew install\fR \fIformula\fR will not upgrade \fIformula\fR if it is installed but outdated\.
+If set, \fBbrew install\fR <formula/cask> will not upgrade <formula/cask> if it is installed but outdated\.
 .
 .TP
 \fBHOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK\fR