diff --git a/xml/src/main/java/org/springframework/xml/sax/SaxUtils.java b/xml/src/main/java/org/springframework/xml/sax/SaxUtils.java
index 02db0129..0ddbfe16 100644
--- a/xml/src/main/java/org/springframework/xml/sax/SaxUtils.java
+++ b/xml/src/main/java/org/springframework/xml/sax/SaxUtils.java
@@ -17,6 +17,7 @@
 package org.springframework.xml.sax;
 
 import java.io.IOException;
+import java.net.URI;
 import java.net.URISyntaxException;
 
 import org.xml.sax.InputSource;
@@ -50,7 +51,7 @@ public abstract class SaxUtils {
     /** Retrieves the URL from the given resource as System ID. Returns <code>null</code> if it cannot be openened. */
     public static String getSystemId(Resource resource) {
         try {
-            return resource.getURL().toURI().toString();
+            return new URI(resource.getURL().toExternalForm()).toString();
         }
         catch (IOException e) {
             return null;