diff --git a/runtime.js b/runtime.js
index f3c67db..381f7eb 100644
--- a/runtime.js
+++ b/runtime.js
@@ -185,6 +185,28 @@ var Primitives = (function() {
 	    return typeof(firstArg) === 'string';
 	},
 
+	'symbol->string': function(arity, returnLabel) {
+	    var firstArg = MACHINE.env[MACHINE.env.length-1];
+	    return firstArg;
+	},
+	
+	'box': function(arity, returnLabel) {
+	    var firstArg = MACHINE.env[MACHINE.env.length-1];
+	    return [firstArg];
+	},
+
+	'set-box!': function(arity, returnLabel) {
+	    var firstArg = MACHINE.env[MACHINE.env.length-1];
+	    var secondArg = MACHINE.env[MACHINE.env.length-2];
+	    firstArg[0] = secondArg;
+	    return;
+	},
+
+	'void': function(arity, returnLabel) {
+	    return;
+	},
+
+ 
  	'call/cc': new Closure(callCCEntry,
  			       1,
  			       [],
diff --git a/test-browser-evaluate.rkt b/test-browser-evaluate.rkt
index ea555ae..89b317d 100644
--- a/test-browser-evaluate.rkt
+++ b/test-browser-evaluate.rkt
@@ -144,5 +144,5 @@
 
 
 
-#;(test (read (open-input-file "tests/conform/program0.sch"))
+(test (read (open-input-file "tests/conform/program0.sch"))
       (port->string (open-input-file "tests/conform/expected0.txt")))
\ No newline at end of file