diff --git a/JSONObject.java b/JSONObject.java
index a1ed4901c..7f69468f1 100644
--- a/JSONObject.java
+++ b/JSONObject.java
@@ -39,6 +39,7 @@ of this software and associated documentation files (the "Software"), to deal
 import java.util.Collection;
 import java.util.Enumeration;
 import java.util.HashMap;
+import java.util.LinkedHashMap;
 import java.util.Iterator;
 import java.util.Locale;
 import java.util.Map;
@@ -181,7 +182,7 @@ public JSONObject() {
         // implementations to rearrange their items for a faster element 
         // retrieval based on associative access.
         // Therefore, an implementation mustn't rely on the order of the item.
-        this.map = new HashMap<String, Object>();
+        this.map = new LinkedHashMap<String, Object>();
     }
 
     /**
@@ -286,9 +287,9 @@ public JSONObject(JSONTokener x) throws JSONException {
      */
     public JSONObject(Map<?, ?> m) {
         if (m == null) {
-            this.map = new HashMap<String, Object>();
+            this.map = new LinkedHashMap<String, Object>();
         } else {
-            this.map = new HashMap<String, Object>(m.size());
+            this.map = new LinkedHashMap<String, Object>(m.size());
         	for (final Entry<?, ?> e : m.entrySet()) {
         	    if(e.getKey() == null) {
         	        throw new NullPointerException("Null key.");
@@ -457,7 +458,7 @@ public JSONObject(String baseName, Locale locale) throws JSONException {
      * @param initialCapacity initial capacity of the internal map.
      */
     protected JSONObject(int initialCapacity){
-        this.map = new HashMap<String, Object>(initialCapacity);
+        this.map = new LinkedHashMap<String, Object>(initialCapacity);
     }
 
     /**
@@ -2532,7 +2533,7 @@ public Writer write(Writer writer, int indentFactor, int indent)
      * @return a java.util.Map containing the entries of this object
      */
     public Map<String, Object> toMap() {
-        Map<String, Object> results = new HashMap<String, Object>();
+        Map<String, Object> results = new LinkedHashMap<String, Object>();
         for (Entry<String, Object> entry : this.entrySet()) {
             Object value;
             if (entry.getValue() == null || NULL.equals(entry.getValue())) {