diff --git a/chrome/content/zotero/xpcom/rdf/identity.js b/chrome/content/zotero/xpcom/rdf/identity.js
index da3b3ead2..f2c803200 100644
--- a/chrome/content/zotero/xpcom/rdf/identity.js
+++ b/chrome/content/zotero/xpcom/rdf/identity.js
@@ -119,7 +119,7 @@ $rdf.IndexedFormula.prototype.newPropertyAction = function newPropertyAction(pre
     this.propertyActions[hash].push(action);
     // Now apply the function to to statements already in the store
     var toBeFixed = this.statementsMatching(undefined, pred, undefined);
-    done = false;
+    var done = false;
     for (var i=0; i<toBeFixed.length; i++) { // NOT optimized - sort toBeFixed etc
         done = done || action(this, toBeFixed[i].subject, pred, toBeFixed[i].object);
     }
diff --git a/chrome/content/zotero/xpcom/rdf/n3parser.js b/chrome/content/zotero/xpcom/rdf/n3parser.js
index 3e7212746..1260be2d0 100644
--- a/chrome/content/zotero/xpcom/rdf/n3parser.js
+++ b/chrome/content/zotero/xpcom/rdf/n3parser.js
@@ -1126,7 +1126,7 @@ __SinkParser.prototype.skipSpace = function(str, i) {
             }
         }
     }
-    val = (tmp.length - str.length) + j;
+    var val = (tmp.length - str.length) + j;
     if( val === tmp.length ) {
         return -1;
     }
diff --git a/chrome/content/zotero/xpcom/rdf/serialize.js b/chrome/content/zotero/xpcom/rdf/serialize.js
index 3e724a981..5baf34b2a 100644
--- a/chrome/content/zotero/xpcom/rdf/serialize.js
+++ b/chrome/content/zotero/xpcom/rdf/serialize.js
@@ -271,7 +271,7 @@ __Serializer.prototype.statementsToN3 = function(sts) {
 
     var namespaceCounts = []; // which have been used
 
-    predMap = {
+    var predMap = {
         'http://www.w3.org/2002/07/owl#sameAs': '=',
         'http://www.w3.org/2000/10/swap/log#implies': '=>',
         'http://www.w3.org/1999/02/22-rdf-syntax-ns#type': 'a'
@@ -288,7 +288,7 @@ __Serializer.prototype.statementsToN3 = function(sts) {
         return s
     }
 
-    treeToLine = function(tree) {
+    var treeToLine = function(tree) {
         var str = '';
         for (var i=0; i<tree.length; i++) {
             var branch = tree[i];
@@ -300,7 +300,7 @@ __Serializer.prototype.statementsToN3 = function(sts) {
     }
     
     // Convert a nested tree of lists and strings to a string
-    treeToString = function(tree, level) {
+    var treeToString = function(tree, level) {
         var str = '';
         var lastLength = 100000;
         if (!level) level = 0;
@@ -484,7 +484,7 @@ __Serializer.prototype.statementsToN3 = function(sts) {
     }
     
     function prefixDirectives() {
-        str = '';
+        var str = '';
 	if (sz.defaultNamespace)
 	  str += '@prefix : <'+sz.defaultNamespace+'>.\n';
         for (var ns in namespaceCounts) {
@@ -563,7 +563,7 @@ function hexify(str) { // also used in parser
 
 
 function backslashUify(str) {
-    var res = '';
+    var res = '', k;
     for (var i=0; i<str.length; i++) {
         k = str.charCodeAt(i);
         if (k>65535)
@@ -599,7 +599,7 @@ __Serializer.prototype.statementsToXML = function(sts) {
         return s
     }
 
-    XMLtreeToLine = function(tree) {
+    var XMLtreeToLine = function(tree) {
         var str = '';
         for (var i=0; i<tree.length; i++) {
             var branch = tree[i];
@@ -610,7 +610,7 @@ __Serializer.prototype.statementsToXML = function(sts) {
     }
     
     // Convert a nested tree of lists and strings to a string
-    XMLtreeToString = function(tree, level) {
+    var XMLtreeToString = function(tree, level) {
         var str = '';
         var lastLength = 100000;
         if (!level) level = 0;
@@ -650,7 +650,7 @@ __Serializer.prototype.statementsToXML = function(sts) {
         sz.suggestPrefix('rdf', 'http://www.w3.org/1999/02/22-rdf-syntax-ns#');
         var stats = sz.rootSubjects(statements);
         var roots = stats.roots;
-        results = []
+        var results = [], root;
         for (var i=0; i<roots.length; i++) {
             root = roots[i];
             results.push(subjectXMLTree(root, stats))
@@ -684,7 +684,7 @@ __Serializer.prototype.statementsToXML = function(sts) {
                 [propertyXMLTree(subject, stats)]).concat(["</rdf:Description>"]);
     }
     function collectionXMLTree(subject, stats) {
-        res = []
+        var res = []
         for (var i=0; i< subject.elements.length; i++) {
             res.push(subjectXMLTree(subject.elements[i], stats));
          }
diff --git a/chrome/content/zotero/xpcom/rdf/term.js b/chrome/content/zotero/xpcom/rdf/term.js
index cced406dd..4f7d1b2ae 100644
--- a/chrome/content/zotero/xpcom/rdf/term.js
+++ b/chrome/content/zotero/xpcom/rdf/term.js
@@ -246,7 +246,7 @@ $rdf.Formula.prototype.collection = function () { // obsolete
 }
 
 $rdf.Formula.prototype.list = function (values) {
-    li = new $rdf.Collection();
+    var li = new $rdf.Collection();
     if (values) {
         for(var i = 0; i<values.length; i++) {
             li.append(values[i]);