diff --git a/Library/Homebrew/formula_installer.rb b/Library/Homebrew/formula_installer.rb
index fe2ef1402a..2d5bc92540 100644
--- a/Library/Homebrew/formula_installer.rb
+++ b/Library/Homebrew/formula_installer.rb
@@ -1156,6 +1156,7 @@ class FormulaInstaller
   def fetch_dependencies
     return if ignore_deps?
 
+    # Don't output dependencies if we're explicitly installing them.
     deps = compute_dependencies.reject do |dep, _options|
       self.class.fetched.include?(dep.to_formula)
     end