diff --git a/CHANGELOG.md b/CHANGELOG.md
index a4db9d0f..ab1c0fae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,6 +27,10 @@ See pull request [#1723](https://github.com/pry/pry/pull/1723)
 
 #### Bug fixes
 
+* Add 'Data' as a deprecated constant for Ruby 2.5 (ls command).
+
+See pull request [#1731](https://github.com/pry/pry/pull/1731)
+
 * Fix a bug where 'cd Hash.new' reported self as an instance of Pry::Config
   in the prompt.
 
diff --git a/lib/pry/commands/ls/constants.rb b/lib/pry/commands/ls/constants.rb
index 8ba5c83a..cf8641ae 100644
--- a/lib/pry/commands/ls/constants.rb
+++ b/lib/pry/commands/ls/constants.rb
@@ -3,7 +3,7 @@ require 'pry/commands/ls/interrogatable'
 class Pry
   class Command::Ls < Pry::ClassCommand
     class Constants < Pry::Command::Ls::Formatter
-      DEPRECATED_CONSTANTS = [:Fixnum, :Bignum, :TimeoutError, :NIL, :FALSE, :TRUE]
+      DEPRECATED_CONSTANTS = [:Data, :Fixnum, :Bignum, :TimeoutError, :NIL, :FALSE, :TRUE]
       DEPRECATED_CONSTANTS << :JavaPackageModuleTemplate if Pry::Helpers::BaseHelpers.jruby?
       include Pry::Command::Ls::Interrogatable