diff --git a/rdf/include/nsIRDFDataSource.h b/rdf/include/nsIRDFDataSource.h
index 2b71fa4f67ae..d3e3dbfddee8 100644
--- a/rdf/include/nsIRDFDataSource.h
+++ b/rdf/include/nsIRDFDataSource.h
@@ -46,7 +46,7 @@ public:
      * that will be used to register the data source in the
      * data source registry.
      */
-    NS_IMETHOD Initialize(const nsString& uri) = 0;
+    NS_IMETHOD Init(const nsString& uri) = 0;
 
     /**
      * Find an RDF resource that points to a given node over the
diff --git a/rdf/src/nsBookmarkDataSource.cpp b/rdf/src/nsBookmarkDataSource.cpp
index ab2254f5fb32..91cc8fa413da 100644
--- a/rdf/src/nsBookmarkDataSource.cpp
+++ b/rdf/src/nsBookmarkDataSource.cpp
@@ -438,7 +438,7 @@ nsBookmarkDataSource::nsBookmarkDataSource(void)
     // this is actually true of all datasources.
     NS_INIT_REFCNT();
     ReadBookmarks(); // XXX do or die, eh?
-    Initialize(kURI_bookmarks);
+    Init(kURI_bookmarks);
 }
 
 nsBookmarkDataSource::~nsBookmarkDataSource(void)
diff --git a/rdf/src/nsMemoryDataSource.cpp b/rdf/src/nsMemoryDataSource.cpp
index 9c2fb5a4a289..47dc01e50d4c 100644
--- a/rdf/src/nsMemoryDataSource.cpp
+++ b/rdf/src/nsMemoryDataSource.cpp
@@ -503,7 +503,7 @@ NS_IMPL_ISUPPORTS(nsMemoryDataSource, kIRDFDataSourceIID);
 
 
 NS_IMETHODIMP
-nsMemoryDataSource::Initialize(const nsString& uri)
+nsMemoryDataSource::Init(const nsString& uri)
 {
     nsresult rv;
 
diff --git a/rdf/src/nsMemoryDataSource.h b/rdf/src/nsMemoryDataSource.h
index 84061a7b0956..1e9b16bf1348 100644
--- a/rdf/src/nsMemoryDataSource.h
+++ b/rdf/src/nsMemoryDataSource.h
@@ -43,7 +43,7 @@ public:
     NS_DECL_ISUPPORTS
 
     // nsIRDFDataSource methods
-    NS_IMETHOD Initialize(const nsString& uri);
+    NS_IMETHOD Init(const nsString& uri);
 
     NS_IMETHOD GetSource(nsIRDFNode* property,
                          nsIRDFNode* target,
diff --git a/rdf/src/nsSimpleDataBase.cpp b/rdf/src/nsSimpleDataBase.cpp
index a594758051f1..14e21400f891 100644
--- a/rdf/src/nsSimpleDataBase.cpp
+++ b/rdf/src/nsSimpleDataBase.cpp
@@ -396,7 +396,7 @@ nsSimpleDataBase::QueryInterface(REFNSIID iid, void** result)
 // nsIRDFDataSource interface
 
 NS_IMETHODIMP
-nsSimpleDataBase::Initialize(const nsString& uri)
+nsSimpleDataBase::Init(const nsString& uri)
 {
     PR_ASSERT(0);
     return NS_ERROR_UNEXPECTED;
diff --git a/rdf/src/nsSimpleDataBase.h b/rdf/src/nsSimpleDataBase.h
index dfb680b44fd1..0a9ab72b68f7 100644
--- a/rdf/src/nsSimpleDataBase.h
+++ b/rdf/src/nsSimpleDataBase.h
@@ -34,7 +34,7 @@ public:
     NS_DECL_ISUPPORTS
 
     // nsIRDFDataSource interface
-    NS_IMETHOD Initialize(const nsString& uri);
+    NS_IMETHOD Init(const nsString& uri);
 
     NS_IMETHOD GetSource(nsIRDFNode* property,
                          nsIRDFNode* target,