diff --git a/ext/java/org/jruby/ext/stringio/StringIO.java b/ext/java/org/jruby/ext/stringio/StringIO.java
index 8505664..fef0da8 100644
--- a/ext/java/org/jruby/ext/stringio/StringIO.java
+++ b/ext/java/org/jruby/ext/stringio/StringIO.java
@@ -308,7 +308,6 @@ private void strioInit(ThreadContext context, int argc, IRubyObject arg0, IRubyO
             int[] oflags = {0};
             int[] fmode = {0};
 
-            // TODO: replace with EncodingUtils#extractModeEncoding
             IRubyObject options = ArgsUtil.getOptionsArg(runtime, maybeOptions);
             IOEncodable.ConvConfig ioEncodable = new IOEncodable.ConvConfig();
             if (!options.isNil()) {