diff --git a/lldb/include/lldb/Core/ArchSpec.h b/lldb/include/lldb/Core/ArchSpec.h
index 331a5780887b..e4d61748d4d6 100644
--- a/lldb/include/lldb/Core/ArchSpec.h
+++ b/lldb/include/lldb/Core/ArchSpec.h
@@ -307,7 +307,7 @@ public:
   /// @return A string representing target CPU for the current
   ///         architecture.
   //------------------------------------------------------------------
-  std::string GetClangTargetCPU();
+  std::string GetClangTargetCPU() const;
 
   //------------------------------------------------------------------
   /// Return a string representing target application ABI.
diff --git a/lldb/source/Core/ArchSpec.cpp b/lldb/source/Core/ArchSpec.cpp
index 0d10ab7be441..9da2942b67a5 100644
--- a/lldb/source/Core/ArchSpec.cpp
+++ b/lldb/source/Core/ArchSpec.cpp
@@ -657,7 +657,7 @@ void ArchSpec::SetFlags(std::string elf_abi) {
   SetFlags(flag);
 }
 
-std::string ArchSpec::GetClangTargetCPU() {
+std::string ArchSpec::GetClangTargetCPU() const {
   std::string cpu;
   const llvm::Triple::ArchType machine = GetMachine();