diff --git a/llvm/include/llvm/Support/WithColor.h b/llvm/include/llvm/Support/WithColor.h
index e80e5d469363d..be498cb082e22 100644
--- a/llvm/include/llvm/Support/WithColor.h
+++ b/llvm/include/llvm/Support/WithColor.h
@@ -51,7 +51,7 @@ enum class ColorMode {
 
 /// An RAII object that temporarily switches an output stream to a specific
 /// color.
-class WithColor {
+class LLVM_ABI WithColor {
 public:
   using AutoDetectFunctionType = bool (*)(const raw_ostream &OS);