diff --git a/compiler/optimizing/nodes.h b/compiler/optimizing/nodes.h
index 9d0b4a9..4706b3b 100644
--- a/compiler/optimizing/nodes.h
+++ b/compiler/optimizing/nodes.h
@@ -1669,7 +1669,12 @@
   uint16_t GetTypeIndex() const { return type_index_; }
 
   // Calls runtime so needs an environment.
-  virtual bool NeedsEnvironment() const { return true; }
+  bool NeedsEnvironment() const OVERRIDE { return true; }
+  // It may throw when called on:
+  //   - interfaces
+  //   - abstract/innaccessible/unknown classes
+  // TODO: optimize when possible.
+  bool CanThrow() const OVERRIDE { return true; }
 
   DECLARE_INSTRUCTION(NewInstance);