diff --git a/massif/ms_main.c b/massif/ms_main.c
index c373c86..3ae8e74 100644
--- a/massif/ms_main.c
+++ b/massif/ms_main.c
@@ -1148,8 +1148,10 @@
 /*--- Instrumentation                                      ---*/
 /*------------------------------------------------------------*/
 
-static IRBB* ms_instrument ( IRBB* bb_in, VexGuestLayout* layout, 
-                             IRType gWordTy, IRType hWordTy )
+static
+IRBB* ms_instrument ( IRBB* bb_in, VexGuestLayout* layout, 
+                      Addr64 orig_addr_noredir, VexGuestExtents* vge,
+                      IRType gWordTy, IRType hWordTy )
 {
    /* XXX Will Massif work when gWordTy != hWordTy ? */
    return bb_in;