diff --git a/src/arch/generic/vec_pred_reg.hh b/src/arch/generic/vec_pred_reg.hh
index 9495911dbf..a9b264e55a 100644
--- a/src/arch/generic/vec_pred_reg.hh
+++ b/src/arch/generic/vec_pred_reg.hh
@@ -400,6 +400,8 @@ struct DummyVecPredRegContainer
     RegVal filler = 0;
     bool operator == (const DummyVecPredRegContainer &d) const { return true; }
     bool operator != (const DummyVecPredRegContainer &d) const { return true; }
+    template <typename VecElem>
+    VecElem *as() { return nullptr; }
 };
 template <>
 struct ParseParam<DummyVecPredRegContainer>
diff --git a/src/arch/generic/vec_reg.hh b/src/arch/generic/vec_reg.hh
index c818b1c8d9..fecd5c6272 100644
--- a/src/arch/generic/vec_reg.hh
+++ b/src/arch/generic/vec_reg.hh
@@ -270,6 +270,8 @@ struct DummyVecRegContainer
     RegVal filler = 0;
     bool operator == (const DummyVecRegContainer &d) const { return true; }
     bool operator != (const DummyVecRegContainer &d) const { return true; }
+    template <typename VecElem>
+    VecElem *as() { return nullptr; }
 };
 template <>
 struct ParseParam<DummyVecRegContainer>