diff --git a/plugins/cleanupIDs.js b/plugins/cleanupIDs.js
index 3d483bf5..b716acf1 100644
--- a/plugins/cleanupIDs.js
+++ b/plugins/cleanupIDs.js
@@ -67,7 +67,11 @@ exports.fn = function(data, params) {
                     item.eachAttr(function(attr) {
                         // save IDs
                         if (attr.name === 'id') {
-                            IDs[idPrefix + attr.value] = item;
+                            if (idPrefix + attr.value in IDs) {
+                                item.removeAttr('id');
+                            } else {
+                                IDs[idPrefix + attr.value] = item;
+                            }
                         }
 
                         // save IDs url() references
diff --git a/test/plugins/cleanupIDs.01.svg b/test/plugins/cleanupIDs.01.svg
index 3db01bb9..ec47400f 100644
--- a/test/plugins/cleanupIDs.01.svg
+++ b/test/plugins/cleanupIDs.01.svg
@@ -9,6 +9,8 @@
         </text>
         <path id="crochet" d="..."/>
         <path id="block" d="..."/>
+        <path id="two" d="..."/>
+        <path id="two" d="..."/>
     </defs>
     <g id="g001">
         <circle id="circle001" fill="url(#gradient001)" cx="60" cy="60" r="50"/>
@@ -19,6 +21,7 @@
         <tref xlink:href="#referencedText"/>
     </g>
     <animateMotion xlink:href="#crochet" dur="0.5s" begin="block.mouseover" fill="freeze" path="m 0,0 0,-21"/>
+    <use xlink:href="#two"/>
 </svg>
 
 @@@
@@ -34,6 +37,8 @@
         </text>
         <path id="c" d="..."/>
         <path id="d" d="..."/>
+        <path id="e" d="..."/>
+        <path d="..."/>
     </defs>
     <g>
         <circle fill="url(#a)" cx="60" cy="60" r="50"/>
@@ -44,4 +49,5 @@
         <tref xlink:href="#b"/>
     </g>
     <animateMotion xlink:href="#c" dur="0.5s" begin="d.mouseover" fill="freeze" path="m 0,0 0,-21"/>
+    <use xlink:href="#e"/>
 </svg>