diff --git a/Library/Homebrew/sorbet/files.yaml b/Library/Homebrew/sorbet/files.yaml
index 3272ee517e..3498653eb4 100644
--- a/Library/Homebrew/sorbet/files.yaml
+++ b/Library/Homebrew/sorbet/files.yaml
@@ -229,7 +229,6 @@ false:
   - ./lock_file.rb
   - ./migrator.rb
   - ./missing_formula.rb
-  - ./os/linux.rb
   - ./os/mac.rb
   - ./os/mac/keg.rb
   - ./os/mac/mach.rb
@@ -499,11 +498,8 @@ false:
   - ./messages.rb
   - ./mktemp.rb
   - ./options.rb
-  - ./os.rb
   - ./os/linux/elf.rb
-  - ./os/linux/glibc.rb
   - ./os/linux/global.rb
-  - ./os/linux/kernel.rb
   - ./os/mac/architecture_list.rb
   - ./pkg_version.rb
   - ./requirements/arch_requirement.rb
@@ -879,6 +875,10 @@ true:
   - ./locale.rb
   - ./metafiles.rb
   - ./official_taps.rb
+  - ./os.rb
+  - ./os/linux.rb
+  - ./os/linux/glibc.rb
+  - ./os/linux/kernel.rb
   - ./rubocops/cask/ast/cask_header.rb
   - ./rubocops/cask/ast/stanza.rb
   - ./rubocops/cask/constants/stanza.rb
diff --git a/Library/Homebrew/sorbet/rbi/os.rbi b/Library/Homebrew/sorbet/rbi/os.rbi
new file mode 100644
index 0000000000..af39ccea3a
--- /dev/null
+++ b/Library/Homebrew/sorbet/rbi/os.rbi
@@ -0,0 +1,14 @@
+# typed: true
+
+module OS
+  module Linux
+    include Kernel
+
+    def which(cmd, path = ENV["PATH"])
+    end
+  end
+
+  module Mac
+    include Kernel
+  end
+end