diff --git a/dlls/webservices/reader.c b/dlls/webservices/reader.c
index a0d0792b4b8..cc71f982bd2 100644
--- a/dlls/webservices/reader.c
+++ b/dlls/webservices/reader.c
@@ -284,7 +284,7 @@ struct node *alloc_node( WS_XML_NODE_TYPE type )
     return ret;
 }
 
-static void free_attribute( WS_XML_ATTRIBUTE *attr )
+void free_attribute( WS_XML_ATTRIBUTE *attr )
 {
     if (!attr) return;
     heap_free( attr->prefix );
@@ -807,7 +807,7 @@ static HRESULT read_xmldecl( struct reader *reader )
     return S_OK;
 }
 
-static HRESULT append_attribute( WS_XML_ELEMENT_NODE *elem, WS_XML_ATTRIBUTE *attr )
+HRESULT append_attribute( WS_XML_ELEMENT_NODE *elem, WS_XML_ATTRIBUTE *attr )
 {
     if (elem->attributeCount)
     {
diff --git a/dlls/webservices/webservices.spec b/dlls/webservices/webservices.spec
index df56adbfef2..c92588b5938 100644
--- a/dlls/webservices/webservices.spec
+++ b/dlls/webservices/webservices.spec
@@ -181,7 +181,7 @@
 @ stub WsWriteMessageStart
 @ stub WsWriteNode
 @ stub WsWriteQualifiedName
-@ stub WsWriteStartAttribute
+@ stdcall WsWriteStartAttribute(ptr ptr ptr ptr long ptr)
 @ stub WsWriteStartCData
 @ stdcall WsWriteStartElement(ptr ptr ptr ptr ptr)
 @ stub WsWriteText
diff --git a/dlls/webservices/webservices_private.h b/dlls/webservices/webservices_private.h
index cac9b87a2da..3bb039fe5cd 100644
--- a/dlls/webservices/webservices_private.h
+++ b/dlls/webservices/webservices_private.h
@@ -29,6 +29,8 @@ void *ws_realloc( WS_HEAP *, void *, SIZE_T ) DECLSPEC_HIDDEN;
 void ws_free( WS_HEAP *, void * ) DECLSPEC_HIDDEN;
 const char *debugstr_xmlstr( const WS_XML_STRING * ) DECLSPEC_HIDDEN;
 WS_XML_STRING *alloc_xml_string( const char *, ULONG ) DECLSPEC_HIDDEN;
+HRESULT append_attribute( WS_XML_ELEMENT_NODE *, WS_XML_ATTRIBUTE * ) DECLSPEC_HIDDEN;
+void free_attribute( WS_XML_ATTRIBUTE * ) DECLSPEC_HIDDEN;
 
 struct node
 {
diff --git a/dlls/webservices/writer.c b/dlls/webservices/writer.c
index 976f97bcebe..a9ff7611a30 100644
--- a/dlls/webservices/writer.c
+++ b/dlls/webservices/writer.c
@@ -632,6 +632,49 @@ HRESULT WINAPI WsWriteEndStartElement( WS_XML_WRITER *handle, WS_ERROR *error )
     return S_OK;
 }
 
+/**************************************************************************
+ *          WsWriteStartAttribute		[webservices.@]
+ */
+HRESULT WINAPI WsWriteStartAttribute( WS_XML_WRITER *handle, const WS_XML_STRING *prefix,
+                                      const WS_XML_STRING *localname, const WS_XML_STRING *ns,
+                                      BOOL single, WS_ERROR *error )
+{
+    struct writer *writer = (struct writer *)handle;
+    WS_XML_ELEMENT_NODE *elem;
+    WS_XML_ATTRIBUTE *attr;
+    HRESULT hr = E_OUTOFMEMORY;
+
+    TRACE( "%p %s %s %s %d %p\n", handle, debugstr_xmlstr(prefix), debugstr_xmlstr(localname),
+           debugstr_xmlstr(ns), single, error );
+    if (error) FIXME( "ignoring error parameter\n" );
+
+    if (!writer || !localname || !ns) return E_INVALIDARG;
+
+    if (writer->state != WRITER_STATE_STARTELEMENT) return WS_E_INVALID_OPERATION;
+    elem = (WS_XML_ELEMENT_NODE *)writer->current;
+
+    if (!(attr = heap_alloc_zero( sizeof(*attr) ))) return E_OUTOFMEMORY;
+    attr->singleQuote = !!single;
+
+    if (prefix && !(attr->prefix = alloc_xml_string( (const char *)prefix->bytes, prefix->length )))
+        goto error;
+
+    if (!(attr->localName = alloc_xml_string( (const char *)localname->bytes, localname->length )))
+        goto error;
+
+    if (!(attr->ns = alloc_xml_string( (const char *)ns->bytes, ns->length )))
+        goto error;
+
+    if ((hr = append_attribute( elem, attr )) != S_OK) goto error;
+
+    writer->state = WRITER_STATE_STARTATTRIBUTE;
+    return S_OK;
+
+error:
+    free_attribute( attr );
+    return hr;
+}
+
 /**************************************************************************
  *          WsWriteStartElement		[webservices.@]
  */