diff --git a/tools/dsymutil/DebugMap.h b/tools/dsymutil/DebugMap.h
index ff2b27e74eb..5bcf7a53b99 100644
--- a/tools/dsymutil/DebugMap.h
+++ b/tools/dsymutil/DebugMap.h
@@ -83,7 +83,7 @@ public:
   /// debug map.
   DebugMapObject &addDebugMapObject(StringRef ObjectFilePath);
 
-  const Triple &getTriple() { return BinaryTriple; }
+  const Triple &getTriple() const { return BinaryTriple; }
 
   void print(raw_ostream &OS) const;