diff --git a/src/xenia/cpu/backend/x64/x64_op.h b/src/xenia/cpu/backend/x64/x64_op.h
index 68e67567c..b923bc31b 100644
--- a/src/xenia/cpu/backend/x64/x64_op.h
+++ b/src/xenia/cpu/backend/x64/x64_op.h
@@ -175,6 +175,10 @@ struct ValueOp : Op<ValueOp<T, KEY_TYPE, REG_TYPE, CONST_TYPE>, KEY_TYPE> {
   virtual bool ConstantFitsIn32Reg() const { return true; }
   const REG_TYPE& reg() const {
     assert_true(!is_constant);
+    if (is_constant) {
+      XELOGE("{} - Invalid handling of constant! Report this to developers!",
+             __FUNCTION__);
+    }
     return reg_;
   }
   operator const REG_TYPE&() const { return reg(); }
diff --git a/src/xenia/cpu/backend/x64/x64_seq_vector.cc b/src/xenia/cpu/backend/x64/x64_seq_vector.cc
index f1996a36a..40da0ac9a 100644
--- a/src/xenia/cpu/backend/x64/x64_seq_vector.cc
+++ b/src/xenia/cpu/backend/x64/x64_seq_vector.cc
@@ -1873,7 +1873,12 @@ struct VECTOR_ROTATE_LEFT_V128
         } break;
         case INT32_TYPE: {
           if (e.IsFeatureEnabled(kX64EmitAVX512Ortho)) {
-            e.vprolvd(i.dest, i.src1, i.src2);
+            if (i.src2.is_constant) {
+              e.LoadConstantXmm(e.xmm0, i.src2.constant());
+              e.vprolvd(i.dest, i.src1, e.xmm0);
+            } else {
+              e.vprolvd(i.dest, i.src1, i.src2);
+            }
           } else if (e.IsFeatureEnabled(kX64EmitAVX2)) {
             Xmm temp = i.dest;
             if (i.dest == i.src1 || i.dest == i.src2) {