diff --git a/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.h b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.h
index 40679f9143b96..6dab79e6e20ae 100644
--- a/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.h
+++ b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.h
@@ -26,7 +26,7 @@ class CGOpenMPRuntimeNVPTX : public CGOpenMPRuntimeGPU {
 
 public:
   explicit CGOpenMPRuntimeNVPTX(CodeGenModule &CGM);
-  llvm::Value *getGPUWarpSize(CodeGenFunction &CGF);
+  llvm::Value *getGPUWarpSize(CodeGenFunction &CGF) override;
 };
 
 } // CodeGen namespace.
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp
index 651d5056dd9d5..dfa70c8ef6c9a 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp
@@ -89,14 +89,14 @@ class SuspendedThreadsListLinux : public SuspendedThreadsList {
  public:
   SuspendedThreadsListLinux() { thread_ids_.reserve(1024); }
 
-  tid_t GetThreadID(uptr index) const;
-  uptr ThreadCount() const;
+  tid_t GetThreadID(uptr index) override const;
+  uptr ThreadCount() const override;
   bool ContainsTid(tid_t thread_id) const;
   void Append(tid_t tid);
 
   PtraceRegistersStatus GetRegistersAndSP(uptr index, uptr *buffer,
-                                          uptr *sp) const;
-  uptr RegisterCount() const;
+                                          uptr *sp) const override;
+  uptr RegisterCount() const override;
 
  private:
   InternalMmapVector<tid_t> thread_ids_;