diff --git a/lib/ruby-debug-ide/command.rb b/lib/ruby-debug-ide/command.rb
index 4d4f732..5f099be 100644
--- a/lib/ruby-debug-ide/command.rb
+++ b/lib/ruby-debug-ide/command.rb
@@ -118,7 +118,7 @@ def timeout(sec)
     def debug_eval(str, b = get_binding)
       begin
         str = str.to_s
-        str.force_encoding('UTF-8') if(RUBY_VERSION > 2.0)
+        str.force_encoding('UTF-8') if(RUBY_VERSION > '2.0')
         to_inspect = Command.unescape_incoming(str)
         max_time = Debugger.evaluation_timeout
         @printer.print_debug("Evaluating %s with timeout after %i sec", str, max_time)