diff --git a/llvm/include/llvm/CodeGen/SelectionDAGNodes.h b/llvm/include/llvm/CodeGen/SelectionDAGNodes.h
index 83158e240594e3..7da81935904dea 100644
--- a/llvm/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/llvm/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -2630,7 +2630,8 @@ template <> struct GraphTraits<SDNode*> {
 /// with 4 and 8 byte pointer alignment, respectively.
 using LargestSDNode = AlignedCharArrayUnion<AtomicSDNode, TargetIndexSDNode,
                                             BlockAddressSDNode,
-                                            GlobalAddressSDNode>;
+                                            GlobalAddressSDNode,
+                                            PseudoProbeSDNode>;
 
 /// The SDNode class with the greatest alignment requirement.
 using MostAlignedSDNode = GlobalAddressSDNode;