diff --git a/src/alloy/backend/x64/lowering/lowering_sequences.cc b/src/alloy/backend/x64/lowering/lowering_sequences.cc
index 8c37e7f5b..5a2b8b8a3 100644
--- a/src/alloy/backend/x64/lowering/lowering_sequences.cc
+++ b/src/alloy/backend/x64/lowering/lowering_sequences.cc
@@ -1736,7 +1736,7 @@ table->AddSequence(OPCODE_LOG2, [](X64Emitter& e, Instr*& i) {
 });
 
 table->AddSequence(OPCODE_DOT_PRODUCT_3, [](X64Emitter& e, Instr*& i) {
-  if (IsVecType(i->dest->type)) {
+  if (IsVecType(i->src1.value->type)) {
     XmmBinaryOp(e, i, i->flags, [](X64Emitter& e, Instr& i, const Xmm& dest_src, const Xmm& src) {
       // http://msdn.microsoft.com/en-us/library/bb514054(v=vs.90).aspx
       // TODO(benvanik): verify ordering
@@ -1751,7 +1751,7 @@ table->AddSequence(OPCODE_DOT_PRODUCT_3, [](X64Emitter& e, Instr*& i) {
 });
 
 table->AddSequence(OPCODE_DOT_PRODUCT_4, [](X64Emitter& e, Instr*& i) {
-  if (IsVecType(i->dest->type)) {
+  if (IsVecType(i->src1.value->type)) {
     XmmBinaryOp(e, i, i->flags, [](X64Emitter& e, Instr& i, const Xmm& dest_src, const Xmm& src) {
       // http://msdn.microsoft.com/en-us/library/bb514054(v=vs.90).aspx
       // TODO(benvanik): verify ordering
diff --git a/src/alloy/backend/x64/lowering/op_utils.inl b/src/alloy/backend/x64/lowering/op_utils.inl
index 8f924e59d..b5ebc792b 100644
--- a/src/alloy/backend/x64/lowering/op_utils.inl
+++ b/src/alloy/backend/x64/lowering/op_utils.inl
@@ -869,7 +869,6 @@ void XmmBinaryOpCV(X64Emitter& e, Instr*& i, xmm_vv_fn vv_fn,
 }
 void XmmBinaryOp(X64Emitter& e, Instr*& i, uint32_t flags, xmm_vv_fn vv_fn) {
   // TODO(benvanik): table lookup. This linear scan is slow.
-  XEASSERT(i->dest->type == i->src1.value->type);
   if (i->Match(SIG_TYPE_IGNORE, SIG_TYPE_F32, SIG_TYPE_F32) ||
       i->Match(SIG_TYPE_IGNORE, SIG_TYPE_F64, SIG_TYPE_F64) ||
       i->Match(SIG_TYPE_IGNORE, SIG_TYPE_V128, SIG_TYPE_V128)) {