diff --git a/llvm/include/llvm/Support/BinaryStreamError.h b/llvm/include/llvm/Support/BinaryStreamError.h
index cf6e034ffd2ce..8a45f7bbd52cc 100644
--- a/llvm/include/llvm/Support/BinaryStreamError.h
+++ b/llvm/include/llvm/Support/BinaryStreamError.h
@@ -10,6 +10,7 @@
 #define LLVM_SUPPORT_BINARYSTREAMERROR_H
 
 #include "llvm/ADT/StringRef.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/Error.h"
 
 #include <string>
@@ -24,7 +25,7 @@ enum class stream_error_code {
 };
 
 /// Base class for errors originating when parsing raw PDB files
-class BinaryStreamError : public ErrorInfo<BinaryStreamError> {
+class LLVM_ABI BinaryStreamError : public ErrorInfo<BinaryStreamError> {
 public:
   static char ID;
   explicit BinaryStreamError(stream_error_code C);