diff --git a/memcheck/mc_translate.c b/memcheck/mc_translate.c
index 738b4313c..d848d83c4 100644
--- a/memcheck/mc_translate.c
+++ b/memcheck/mc_translate.c
@@ -2574,6 +2574,10 @@ IRExpr* expr2vbits_Unop ( MCEnv* mce, IROp op, IRAtom* atom )
       case Iop_NegF64:
       case Iop_AbsF64:
       case Iop_Est5FRSqrt:
+      case Iop_RoundF64toF64_NEAREST:
+      case Iop_RoundF64toF64_NegINF:
+      case Iop_RoundF64toF64_PosINF:
+      case Iop_RoundF64toF64_ZERO:
       case Iop_Clz64:
       case Iop_Ctz64:
          return mkPCastTo(mce, Ity_I64, vatom);