diff --git a/lib/pdk/util.rb b/lib/pdk/util.rb
index 9b8e7de2d..6c5c17dee 100644
--- a/lib/pdk/util.rb
+++ b/lib/pdk/util.rb
@@ -32,6 +32,7 @@ module Util
     def exit_process(exit_code)
       exit exit_code
     end
+    module_function :exit_process
     # :nocov:
 
     # Searches upwards from current working directory for the given target file.