diff --git a/llvm/include/llvm/ProfileData/SampleProfReader.h b/llvm/include/llvm/ProfileData/SampleProfReader.h
index 49bf8be64c7f..93acad373154 100644
--- a/llvm/include/llvm/ProfileData/SampleProfReader.h
+++ b/llvm/include/llvm/ProfileData/SampleProfReader.h
@@ -480,7 +480,7 @@ protected:
   std::error_code readSecHdrTableEntry();
   std::error_code readSecHdrTable();
   virtual std::error_code readHeader() override;
-  virtual std::error_code verifySPMagic(uint64_t Magic) = 0;
+  virtual std::error_code verifySPMagic(uint64_t Magic) override = 0;
 
 public:
   SampleProfileReaderExtBinaryBase(std::unique_ptr<MemoryBuffer> B,
diff --git a/llvm/include/llvm/ProfileData/SampleProfWriter.h b/llvm/include/llvm/ProfileData/SampleProfWriter.h
index 4243ae7e7d50..67df6d3cd0e1 100644
--- a/llvm/include/llvm/ProfileData/SampleProfWriter.h
+++ b/llvm/include/llvm/ProfileData/SampleProfWriter.h
@@ -109,12 +109,12 @@ private:
 /// Sample-based profile writer (binary format).
 class SampleProfileWriterBinary : public SampleProfileWriter {
 public:
-  virtual std::error_code writeSample(const FunctionSamples &S) override;
-
-protected:
   SampleProfileWriterBinary(std::unique_ptr<raw_ostream> &OS)
       : SampleProfileWriter(OS) {}
 
+  virtual std::error_code writeSample(const FunctionSamples &S) override;
+
+protected:
   virtual std::error_code writeMagicIdent(SampleProfileFormat Format);
   virtual std::error_code writeNameTable();
   virtual std::error_code
@@ -176,7 +176,7 @@ class SampleProfileWriterExtBinary : public SampleProfileWriterExtBinaryBase {
   using SampleProfileWriterExtBinaryBase::SampleProfileWriterExtBinaryBase;
 
 private:
-  virtual void initSectionLayout() {
+  virtual void initSectionLayout() override {
     SectionLayout = {SecProfSummary, SecNameTable, SecLBRProfile};
   };
   virtual std::error_code