diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
index 5771043..149642b 100644
--- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -230,7 +230,7 @@
                          DiagnosticHandlerFunction DiagnosticHandler);
   explicit BitcodeReader(DataStreamer *streamer, LLVMContext &C,
                          DiagnosticHandlerFunction DiagnosticHandler);
-  ~BitcodeReader() { FreeState(); }
+  ~BitcodeReader() override { FreeState(); }
 
   std::error_code materializeForwardReferencedFunctions();