diff --git a/content/xslt/src/xpath/nsXPathResult.cpp b/content/xslt/src/xpath/nsXPathResult.cpp
index 49399070155..fa01642cbe0 100644
--- a/content/xslt/src/xpath/nsXPathResult.cpp
+++ b/content/xslt/src/xpath/nsXPathResult.cpp
@@ -202,9 +202,9 @@ NS_IMPL_NSIDOCUMENTOBSERVER_STYLE_STUB(nsXPathResult)
 NS_IMPL_NSIDOCUMENTOBSERVER_STATE_STUB(nsXPathResult)
 
 void
-nsXPathResult::ContentChanged(nsIDocument* aDocument,
-                              nsIContent *aContent,
-                              nsISupports *aSubContent)
+nsXPathResult::CharacterDataChanged(nsIDocument* aDocument,
+                                    nsIContent *aContent,
+                                    PRBool aAppend)
 {
     Invalidate();
 }
diff --git a/content/xslt/src/xslt/txMozillaXSLTProcessor.cpp b/content/xslt/src/xslt/txMozillaXSLTProcessor.cpp
index b1174e3633f..7e9ecdac0c6 100644
--- a/content/xslt/src/xslt/txMozillaXSLTProcessor.cpp
+++ b/content/xslt/src/xslt/txMozillaXSLTProcessor.cpp
@@ -846,9 +846,9 @@ txMozillaXSLTProcessor::DocumentWillBeDestroyed(nsIDocument* aDocument)
 }
 
 void
-txMozillaXSLTProcessor::ContentChanged(nsIDocument* aDocument,
-                                       nsIContent *aContent,
-                                       nsISupports *aSubContent)
+txMozillaXSLTProcessor::CharacterDataChanged(nsIDocument* aDocument,
+                                             nsIContent *aContent,
+                                             PRBool aAppend)
 {
     mStylesheet = nsnull;
 }