diff --git a/plugins/tiddlywiki/filesystem/filesystemadaptor.js b/plugins/tiddlywiki/filesystem/filesystemadaptor.js
index 0ed686c8495..0692fb2fef0 100644
--- a/plugins/tiddlywiki/filesystem/filesystemadaptor.js
+++ b/plugins/tiddlywiki/filesystem/filesystemadaptor.js
@@ -140,7 +140,7 @@ FileSystemAdaptor.prototype.deleteTiddler = function(title,callback,options) {
 				}
 			}
 			// Remove the tiddler from self.boot.files & return null adaptorInfo
-			delete self.boot.files[title];
+			self.deleteTiddlerInCache(title);
 			return callback(null,null);
 		});
 	} else {
@@ -148,6 +148,16 @@ FileSystemAdaptor.prototype.deleteTiddler = function(title,callback,options) {
 	}
 };
 
+/*
+Delete a tiddler in cache, without modifying file system.
+*/
+FileSystemAdaptor.prototype.deleteTiddlerInCache = function(title) {
+	// Only delete the tiddler if we have writable information for the file
+	if(this.boot.files[title]) {
+		delete this.boot.files[title];
+	};
+};
+
 if(fs) {
 	exports.adaptorClass = FileSystemAdaptor;
 }