diff --git a/clang/lib/AST/Interp/InterpFrame.h b/clang/lib/AST/Interp/InterpFrame.h
index ca9803d48dd15d..88b4a5af8e5a5b 100644
--- a/clang/lib/AST/Interp/InterpFrame.h
+++ b/clang/lib/AST/Interp/InterpFrame.h
@@ -63,7 +63,7 @@ class InterpFrame final : public Frame {
   size_t getFrameOffset() const { return FrameOffset; }
 
   /// Returns the value of a local variable.
-  template <typename T> const T &getLocal(unsigned Offset) {
+  template <typename T> const T &getLocal(unsigned Offset) const {
     return localRef<T>(Offset);
   }
 
@@ -118,7 +118,7 @@ class InterpFrame final : public Frame {
   }
 
   /// Returns an offset to a local.
-  template <typename T> T &localRef(unsigned Offset) {
+  template <typename T> T &localRef(unsigned Offset) const {
     return *reinterpret_cast<T *>(Locals.get() + Offset);
   }