diff -r 97c8ae330efe -r f050c30952c0 core/src/luan/modules/IoLuan.java
--- a/core/src/luan/modules/IoLuan.java	Wed Aug 26 04:38:37 2015 -0600
+++ b/core/src/luan/modules/IoLuan.java	Thu Aug 27 08:35:03 2015 -0600
@@ -302,6 +302,30 @@
 		}
 	}
 
+	private static final LuanIO nullIO = new LuanIO() {
+		private final InputStream in = new InputStream() {
+			@Override public int read() {
+				return -1;
+			}
+		};
+		private final OutputStream out = new OutputStream() {
+			@Override public void write(int b) {}
+		};
+
+		@Override InputStream inputStream() {
+			return in;
+		}
+
+		@Override OutputStream outputStream() {
+			return out;
+		}
+
+		@Override public String to_string() {
+			return "<null>";
+		}
+
+	};
+
 	public static final class LuanString extends LuanIO {
 		private String s;
 
@@ -487,6 +511,10 @@
 		}
 	}
 
+	public static LuanTable null_() {
+		return nullIO.table();
+	}
+
 	public static LuanTable string(LuanState luan,String s) throws LuanException {
 		Utils.checkNotNull(luan,s);
 		return new LuanString(s).table();
@@ -558,6 +586,7 @@
 	public static LuanTable newSchemes() {
 		LuanTable schemes = new LuanTable();
 		try {
+			schemes.rawPut( "null", new LuanJavaFunction(IoLuan.class.getMethod("null_"),null) );
 			add( schemes, "string", LuanState.class, String.class );
 			add( schemes, "file", LuanState.class, String.class, Boolean.class );
 			add( schemes, "classpath", LuanState.class, String.class, Boolean.class );