diff --git a/Library/Homebrew/rubocops/uses_from_macos.rb b/Library/Homebrew/rubocops/uses_from_macos.rb
index e388388dd8..70b4e3ac3d 100644
--- a/Library/Homebrew/rubocops/uses_from_macos.rb
+++ b/Library/Homebrew/rubocops/uses_from_macos.rb
@@ -32,6 +32,7 @@ module RuboCop
           libiconv
           libpcap
           libressl
+          libxcrypt
           libxml2
           libxslt
           llvm