diff --git a/lib/dry/inflector/inflections/defaults.rb b/lib/dry/inflector/inflections/defaults.rb
index 294164f..83bd5ed 100644
--- a/lib/dry/inflector/inflections/defaults.rb
+++ b/lib/dry/inflector/inflections/defaults.rb
@@ -110,7 +110,7 @@ def self.uncountable(inflect)
         # @since 0.1.2
         # @api private
         def self.acronyms(inflect)
-          inflect.acronym(*%w[JSON HTTP OpenSSL HMAC CSRF API])
+          inflect.acronym(*%w[JSON HTTP OpenSSL HMAC CSRF API CSV])
         end
 
         private_class_method :plural, :singular, :irregular, :uncountable, :acronyms