Index: src/org/jruby/runtime/load/LoadService.java
===================================================================
--- src/org/jruby/runtime/load/LoadService.java	(revision 3615)
+++ src/org/jruby/runtime/load/LoadService.java	(working copy)
@@ -49,6 +49,8 @@
 
 import org.jruby.Ruby;
 import org.jruby.RubyArray;
+import org.jruby.RubyHash;
+import org.jruby.RubyString;
 import org.jruby.ast.executable.Script;
 import org.jruby.exceptions.RaiseException;
 import org.jruby.runtime.Constants;
@@ -149,6 +151,17 @@
             addPath((String) iter.next());
         }
 
+        // add $RUBYLIB paths
+       RubyHash env = (RubyHash) runtime.getObject().getConstant("ENV");
+       RubyString env_rubylib = runtime.newString("RUBYLIB");
+       if (env.has_key(env_rubylib).isTrue()) {
+           String rubylib = env.aref(env_rubylib).toString();
+           String[] paths = rubylib.split(":");
+           for (int i = 0; i < paths.length; i++) {
+               addPath(paths[i]);
+           }
+       }
+
         // wrap in try/catch for security exceptions in an applet
         if (!Ruby.isSecurityRestricted()) {
           String jrubyHome = runtime.getJRubyHome();