diff --git a/Changelog.md b/Changelog.md
index b420bba86..7bfe8f616 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -5,6 +5,7 @@ Bug Fixes:
 
 * Reset `ActiveSupport::CurrentAttributes` between examples. (Javier Julio, #2752)
 * Fix a broken link in generated mailer previews. (Chiara Núñez, #2764)
+* Have HttpStatusMatcher use Rack's public API for http status code. (Darren Boyd, #2763)
 
 ### 6.1.2 / 2024-03-19
 [Full Changelog](https://github.com/rspec/rspec-rails/compare/v6.1.1...v6.1.2)
diff --git a/lib/rspec/rails/matchers/have_http_status.rb b/lib/rspec/rails/matchers/have_http_status.rb
index 858ef547b..878ceadc7 100644
--- a/lib/rspec/rails/matchers/have_http_status.rb
+++ b/lib/rspec/rails/matchers/have_http_status.rb
@@ -216,11 +216,7 @@ def pp_status(status, code)
           # @see Rack::Utils::SYMBOL_TO_STATUS_CODE
           # @raise [ArgumentError] if an associated code could not be found
           def set_expected_code!
-            @expected ||=
-              Rack::Utils::SYMBOL_TO_STATUS_CODE.fetch(expected_status) do
-                raise ArgumentError,
-                      "Invalid HTTP status: #{expected_status.inspect}"
-              end
+            @expected ||= Rack::Utils.status_code(expected_status)
           end
         end