diff --git a/lib/friendly_id/configuration.rb b/lib/friendly_id/configuration.rb
index e6651545e..9d433be22 100644
--- a/lib/friendly_id/configuration.rb
+++ b/lib/friendly_id/configuration.rb
@@ -114,7 +114,7 @@ def reserved=(*args)
     # @deprecated Please use {#approximate_ascii approximate_ascii}.
     def strip_diacritics=(*args)
       warn('strip_diacritics is deprecated and will be removed from 3.0. Please use #approximate_ascii')
-      self.strip_diacritics = *args
+      self.approximate_ascii = *args
     end
 
     %w[approximate_ascii normalizer scope strip_non_ascii use_slug].each do |method|
@@ -129,4 +129,4 @@ def #{method}?
 
   end
 
-end
\ No newline at end of file
+end