diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_flags.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_flags.cpp
index 684ee1e0b9995..d3290493fd6da 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_flags.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_flags.cpp
@@ -91,7 +91,7 @@ class FlagHandlerInclude : public FlagHandlerBase {
     }
     return parser_->ParseFile(value, ignore_missing_);
   }
-  bool Format(char *buffer, uptr size) {
+  bool Format(char *buffer, uptr size) override {
     // Note `original_path_` isn't actually what's parsed due to `%`
     // substitutions. Printing the substituted path would require holding onto
     // mmap'ed memory.
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_mac.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_mac.cpp
index 6c577426ad566..7f9529aa35562 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_mac.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_mac.cpp
@@ -31,15 +31,15 @@ class SuspendedThreadsListMac : public SuspendedThreadsList {
  public:
   SuspendedThreadsListMac() : threads_(1024) {}
 
-  tid_t GetThreadID(uptr index) const;
+  tid_t GetThreadID(uptr index) const override;
   thread_t GetThread(uptr index) const;
-  uptr ThreadCount() const;
+  uptr ThreadCount() const override;
   bool ContainsThread(thread_t thread) const;
   void Append(thread_t thread);
 
   PtraceRegistersStatus GetRegistersAndSP(uptr index, uptr *buffer,
-                                          uptr *sp) const;
-  uptr RegisterCount() const;
+                                          uptr *sp) const override;
+  uptr RegisterCount() const override;
 
  private:
   InternalMmapVector<SuspendedThreadInfo> threads_;