diff --git a/lib/rubygems/doctor.rb b/lib/rubygems/doctor.rb
index 0aa0f7b..3c71fd5 100644
--- a/lib/rubygems/doctor.rb
+++ b/lib/rubygems/doctor.rb
@@ -105,7 +105,7 @@ class Gem::Doctor
       next if ent == "." || ent == ".."
 
       child = File.join(directory, ent)
-      next unless File.exists?(child)
+      next unless File.exist?(child)
 
       basename = File.basename(child, extension)
       next if installed_specs.include? basename