diff --git a/lib/irb/command/copy.rb b/lib/irb/command/copy.rb
index 93410b878..6b3bcc651 100644
--- a/lib/irb/command/copy.rb
+++ b/lib/irb/command/copy.rb
@@ -54,6 +54,8 @@ def copy_to_clipboard(text)
       def clipboard_program
         @clipboard_program ||= if IRB.conf[:COPY_COMMAND]
                                  IRB.conf[:COPY_COMMAND]
+                               elsif executable?("clip.exe")
+                                 "clip.exe"
                                elsif executable?("pbcopy")
                                  "pbcopy"
                                elsif executable?("xclip")
@@ -62,11 +64,19 @@ def clipboard_program
       end
 
       def executable?(command)
-        system("which #{command} > /dev/null 2>&1")
+        if windows?
+          system("where #{command} > NUL 2>&1")
+        else
+          system("which #{command} > /dev/null 2>&1")
+        end
       end
 
       def clipboard_available?
-        !!clipboard_program
+        windows? || !!clipboard_program
+      end
+
+      def windows?
+        /mingw|mswin/.match?(RUBY_PLATFORM)
       end
     end
   end