diff --git a/src/coreclr/jit/lclmorph.cpp b/src/coreclr/jit/lclmorph.cpp
index e3e9cccb7d51d1..38431916e065fd 100644
--- a/src/coreclr/jit/lclmorph.cpp
+++ b/src/coreclr/jit/lclmorph.cpp
@@ -1209,6 +1209,14 @@ class LocalAddressVisitor final : public GenTreeVisitor<LocalAddressVisitor>
                     assert(elementType == TYP_SIMD12);
                     assert(varDsc->TypeGet() == TYP_SIMD16);
 
+                    // If we are not doing struct promotion and we have zero-initialization,
+                    // then we need to produce a VecCon(0).
+                    if (elementNode->IsIntegralConst(0))
+                    {
+                        DEBUG_DESTROY_NODE(elementNode);
+                        elementNode = m_compiler->gtNewZeroConNode(TYP_SIMD12);
+                    }
+
                     // We inverse the operands here and take elementNode as the main value and simdLclNode[3] as the
                     // new value. This gives us a new TYP_SIMD16 with all elements in the right spots