diff --git a/src/string.cr b/src/string.cr
index 14f328553f0e..c8bcc85d4718 100644
--- a/src/string.cr
+++ b/src/string.cr
@@ -907,6 +907,7 @@ class String
     byte_slice start, bytesize - start
   end
 
+  @[Deprecated("Use .char_at(index).ord instead")]
   def codepoint_at(index)
     char_at(index).ord
   end