diff --git a/compiler/optimizing/ssa_builder.cc b/compiler/optimizing/ssa_builder.cc
index c8244aa..165d09d 100644
--- a/compiler/optimizing/ssa_builder.cc
+++ b/compiler/optimizing/ssa_builder.cc
@@ -934,7 +934,7 @@
     if (arg_this->IsNewInstance()) {
       uninitialized_strings_.push_back(arg_this->AsNewInstance());
     } else {
-      DCHECK(arg_this->IsIrreducibleLoopHeaderPhi());
+      DCHECK(arg_this->IsPhi());
       // NewInstance is not the direct input of the StringFactory call. It might
       // be redundant but optimizing this case is not worth the effort.
     }