diff --git a/mlir/include/mlir/IR/OpDefinition.h b/mlir/include/mlir/IR/OpDefinition.h
--- a/mlir/include/mlir/IR/OpDefinition.h
+++ b/mlir/include/mlir/IR/OpDefinition.h
@@ -240,7 +240,7 @@
   using PointerUnion<Attribute, Value>::PointerUnion;
 
 public:
-  void dump() { llvm::errs() << *this << "\n"; }
+  void dump() const { llvm::errs() << *this << "\n"; }
 };
 
 /// Allow printing to a stream.