diff --git a/Makefile b/Makefile
index 66ee024b..281a2bab 100644
--- a/Makefile
+++ b/Makefile
@@ -74,6 +74,7 @@ BROWSER_FILES=browser/screen.js\
 		  browser/network.js browser/lib.js browser/starter.js browser/worker_bus.js
 
 build/v86_all.js: src/*.js src/browser/*.js lib/*.js
+	mkdir -p build
 	-ls -lh build/v86_all.js
 	cd src &&\
 	java -jar $(CLOSURE) \
@@ -95,6 +96,7 @@ build/v86_all.js: src/*.js src/browser/*.js lib/*.js
 
 
 build/libv86.js: src/*.js lib/*.js src/browser/*.js
+	mkdir -p build
 	-ls -lh build/libv86.js
 	cd src &&\
 	java -jar $(CLOSURE) \
diff --git a/lib/filesystem.js b/lib/filesystem.js
index 16ee318b..740af3a4 100755
--- a/lib/filesystem.js
+++ b/lib/filesystem.js
@@ -374,6 +374,7 @@ FS.prototype.CreateTextFile = function(filename, parentid, str) {
     //x.waswritten = true;
     x.size = str.length;
     for (var j in str) {
+    for (var j = 0; j < str.length; j++)
         data[j] = str.charCodeAt(j);
     }
     return id;
diff --git a/src/externs.js b/src/externs.js
index 186852ae..a24e1730 100644
--- a/src/externs.js
+++ b/src/externs.js
@@ -3,7 +3,7 @@ var performance = {};
 
 
 var global = {};
-var require = function() {};
+var require = function(module) {};
 var process = {};
 var __dirname = "";