diff --git a/tools/llvm-diff/DiffConsumer.cpp b/tools/llvm-diff/DiffConsumer.cpp
index 24b372d0229..d9e181470e0 100644
--- a/tools/llvm-diff/DiffConsumer.cpp
+++ b/tools/llvm-diff/DiffConsumer.cpp
@@ -64,7 +64,7 @@ void DiffConsumer::printValue(Value *V, bool isL) {
     }
     return;
   }
-  if (dyn_cast<Constant>(V)) {
+  if (isa<Constant>(V)) {
     out << *V;
     return;
   }