diff --git a/mozilla/xpcom/src/IIDS.h b/mozilla/xpcom/src/IIDS.h
index 93f9ed70e4a..e72ceee0f97 100644
--- a/mozilla/xpcom/src/IIDS.h
+++ b/mozilla/xpcom/src/IIDS.h
@@ -1085,7 +1085,7 @@ nsIDOMHTMLLayerElement = { /* a6cf9100-15b3-11d2-932e-00805f8add32 */
     0x11d2,
     {0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32}
   };
-INTERFACENAME = { /* a6cf9101-15b3-11d2-932e-00805f8add32 */
+nsICSSLoader = { /* a6cf9101-15b3-11d2-932e-00805f8add32 */
     0xa6cf9101,
     0x15b3,
     0x11d2,