diff --git a/AUTHORS b/AUTHORS
index f97fa1a..9eea44b 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -1 +1,2 @@
-Alan K <ack@modeswitch.org> (blog.modeswitch.org)
\ No newline at end of file
+Alan K <ack@modeswitch.org> (blog.modeswitch.org)
+David Humphrey <david.humphrey@senecacollege.ca> (@humphd)
diff --git a/src/fs.js b/src/fs.js
index 8789881..713517a 100644
--- a/src/fs.js
+++ b/src/fs.js
@@ -897,7 +897,7 @@ define(function(require) {
           deferred.reject(new EInvalid('flags is not valid'));
         }
 
-        open_file(this, files, path, flags, check_result);
+        open_file(that, files, path, flags, check_result);
         deferred.promise.then(
           function(result) {
             callback(undefined, result);
@@ -1201,7 +1201,7 @@ define(function(require) {
           deferred.reject(new EInvalid('flags is not valid'));
         }
 
-        open_file(this, files, path, flags, function(err, fileNode) {
+        open_file(that, files, path, flags, function(err, fileNode) {
           if(err) {
             // TODO: abort transaction?
             return deferred.reject(err);
@@ -1323,7 +1323,7 @@ define(function(require) {
           data = new TextEncoder('utf-8').encode(data);
         }
 
-        open_file(this, files, path, flags, function(err, fileNode) {
+        open_file(that, files, path, flags, function(err, fileNode) {
           if(err) {
             // TODO: abort transaction?
             return deferred.reject(err);