diff --git a/lib/tty/prompt/list.rb b/lib/tty/prompt/list.rb
index 09092e4b..b71d0262 100644
--- a/lib/tty/prompt/list.rb
+++ b/lib/tty/prompt/list.rb
@@ -207,7 +207,7 @@ def choices(values = (not_set = true))
           else
             filter_value = @filter.join.downcase
             @filter_cache[filter_value] ||= @choices.enabled.select do |choice|
-              choice.name.downcase.include?(filter_value)
+              choice.name.to_s.downcase.include?(filter_value)
             end
           end
         else
diff --git a/spec/unit/select_spec.rb b/spec/unit/select_spec.rb
index 08007a71..b733711e 100644
--- a/spec/unit/select_spec.rb
+++ b/spec/unit/select_spec.rb
@@ -781,8 +781,8 @@ def exit_message(prompt, choice)
       prompt.input << "g" << "\r"
       prompt.input.rewind
 
-      answer = prompt.select("What size?", %w(Small Medium Large Huge), filter: true)
-      expect(answer).to eql("Large")
+      answer = prompt.select("What size?", %i(Small Medium Large Huge), filter: true)
+      expect(answer).to eql(:Large)
 
       actual_prompt_output = prompt.output.string
       expected_prompt_output =