diff --git a/dlls/webservices/string.c b/dlls/webservices/string.c
index 75e8b75..45a5512 100644
--- a/dlls/webservices/string.c
+++ b/dlls/webservices/string.c
@@ -152,18 +152,6 @@
     return S_OK;
 }
 
-HRESULT CALLBACK insert_string_cb( void *state, const WS_XML_STRING *str, BOOL *found, ULONG *id, WS_ERROR *error )
-{
-    struct dictionary *dict = state;
-    int index = find_string( dict, str->bytes, str->length, id );
-    HRESULT hr = S_OK;
-
-    assert( !dict->dict.isConst );
-    if (index == -1 || (hr = insert_string( dict, str->bytes, str->length, index, id )) == S_OK) *found = TRUE;
-    else *found = FALSE;
-    return hr;
-}
-
 HRESULT add_xml_string( WS_XML_STRING *str )
 {
     HRESULT hr = S_OK;
diff --git a/dlls/webservices/webservices_private.h b/dlls/webservices/webservices_private.h
index d30f7a3..f8cc6d9 100644
--- a/dlls/webservices/webservices_private.h
+++ b/dlls/webservices/webservices_private.h
@@ -49,7 +49,6 @@
 
 int find_string( const struct dictionary *, const unsigned char *, ULONG, ULONG * ) DECLSPEC_HIDDEN;
 HRESULT insert_string( struct dictionary *, unsigned char *, ULONG, int, ULONG * ) DECLSPEC_HIDDEN;
-HRESULT CALLBACK insert_string_cb( void *, const WS_XML_STRING *, BOOL *, ULONG *, WS_ERROR * ) DECLSPEC_HIDDEN;
 void clear_dict( struct dictionary * ) DECLSPEC_HIDDEN;
 HRESULT writer_enable_lookup( WS_XML_WRITER * ) DECLSPEC_HIDDEN;