diff --git a/plugins/prefixIds.js b/plugins/prefixIds.js
index ddda078fc..755baa65a 100644
--- a/plugins/prefixIds.js
+++ b/plugins/prefixIds.js
@@ -13,7 +13,7 @@ exports.description = 'prefix IDs';
 
 var path = require('path'),
     csstree = require('css-tree'),
-    cssRx = require('css-url-regex')(),
+    cssRx = require('css-url-regex'),
     unquote = require('unquote'),
     collections = require('./_collections.js'),
     referencesProps = collections.referencesProps,
@@ -37,7 +37,7 @@ var matchId = function(urlVal) {
 
 // Matches an url(...) value, captures the URL
 var matchUrl = function(val) {
-    var urlMatches = cssRx.exec(val);
+    var urlMatches = cssRx().exec(val);
     if (urlMatches === null) {
         return false;
     }
diff --git a/test/plugins/prefixIds.05.svg b/test/plugins/prefixIds.05.svg
new file mode 100644
index 000000000..d7805dd5d
--- /dev/null
+++ b/test/plugins/prefixIds.05.svg
@@ -0,0 +1,41 @@
+<svg width="340" height="120" xmlns="http://www.w3.org/2000/svg">
+    <defs>
+        <linearGradient id="gradient_1">
+            <stop offset="5%" stop-color="green"/>
+            <stop offset="95%" stop-color="gold"/>
+        </linearGradient>
+        <linearGradient id="gradient_2">
+            <stop offset="5%" stop-color="red"/>
+            <stop offset="95%" stop-color="black"/>
+        </linearGradient>
+        <linearGradient id="gradient_3">
+            <stop offset="5%" stop-color="blue"/>
+            <stop offset="95%" stop-color="orange"/>
+        </linearGradient>
+    </defs>
+    <rect fill="url(#gradient_1)" x="10" y="10" width="100" height="100"/>
+    <rect fill="url(#gradient_2)" x="120" y="10" width="100" height="100"/>
+    <rect fill="url(#gradient_3)" x="230" y="10" width="100" height="100"/>
+</svg>
+
+@@@
+
+<svg width="340" height="120" xmlns="http://www.w3.org/2000/svg">
+    <defs>
+        <linearGradient id="prefixIds_05_svg__gradient_1">
+            <stop offset="5%" stop-color="green"/>
+            <stop offset="95%" stop-color="gold"/>
+        </linearGradient>
+        <linearGradient id="prefixIds_05_svg__gradient_2">
+            <stop offset="5%" stop-color="red"/>
+            <stop offset="95%" stop-color="black"/>
+        </linearGradient>
+        <linearGradient id="prefixIds_05_svg__gradient_3">
+            <stop offset="5%" stop-color="blue"/>
+            <stop offset="95%" stop-color="orange"/>
+        </linearGradient>
+    </defs>
+    <rect fill="url(#prefixIds_05_svg__gradient_1)" x="10" y="10" width="100" height="100"/>
+    <rect fill="url(#prefixIds_05_svg__gradient_2)" x="120" y="10" width="100" height="100"/>
+    <rect fill="url(#prefixIds_05_svg__gradient_3)" x="230" y="10" width="100" height="100"/>
+</svg>