diff --git a/activesupport/lib/active_support/core_ext/module/delegation.rb b/activesupport/lib/active_support/core_ext/module/delegation.rb
index 3a7652f5bfeb719a6b683ee8ce683228bb18ff7e..1777a4b32d909485d3811f7210d5994ecfc5dd50 100644
--- a/activesupport/lib/active_support/core_ext/module/delegation.rb
+++ b/activesupport/lib/active_support/core_ext/module/delegation.rb
@@ -113,7 +113,7 @@ def delegate(*methods)
       raise ArgumentError, "Can only automatically set the delegation prefix when delegating to a method."
     end
 
-    prefix = options[:prefix] && "#{options[:prefix] == true ? to : options[:prefix]}_" || ''
+    prefix = options[:prefix] ? "#{options[:prefix] == true ? to : options[:prefix]}_" : ''
 
     file, line = caller.first.split(':', 2)
     line = line.to_i