diff --git a/executable_semantics/ast/pattern.h b/executable_semantics/ast/pattern.h
index fcee26ccb66a..aa12a4566123 100644
--- a/executable_semantics/ast/pattern.h
+++ b/executable_semantics/ast/pattern.h
@@ -42,6 +42,7 @@ class Pattern {
   auto LineNumber() const -> int { return line_num; }
 
   void Print(llvm::raw_ostream& out) const;
+  LLVM_DUMP_METHOD void Dump() const { Print(llvm::errs()); }
 
  protected:
   // Constructs a Pattern representing syntax at the given line number.