diff --git a/llvm/include/llvm/ADT/StringSwitch.h b/llvm/include/llvm/ADT/StringSwitch.h
index 486815328ead7..8c8d31bd4f055 100644
--- a/llvm/include/llvm/ADT/StringSwitch.h
+++ b/llvm/include/llvm/ADT/StringSwitch.h
@@ -89,6 +89,7 @@ class StringSwitch {
     return CasesImpl(CaseStrings, Value);
   }
 
+  [[deprecated("Pass cases in std::initializer_list instead")]]
   StringSwitch &Cases(StringLiteral S0, StringLiteral S1, T Value) {
     return CasesImpl({S0, S1}, Value);
   }