diff --git a/lld/test/mach-o/usage.yaml b/lld/test/mach-o/usage.yaml
--- a/lld/test/mach-o/usage.yaml
+++ b/lld/test/mach-o/usage.yaml
@@ -1,4 +1,5 @@
 # RUN: not ld64.lld | FileCheck %s
+# RUN: not lld -flavor old-darwin | FileCheck %s
 #
 # Test that running darwin linker with no option prints out usage message.
 #
diff --git a/lld/tools/lld/lld.cpp b/lld/tools/lld/lld.cpp
--- a/lld/tools/lld/lld.cpp
+++ b/lld/tools/lld/lld.cpp
@@ -44,10 +44,10 @@
 
 enum Flavor {
   Invalid,
-  Gnu,     // -flavor gnu
-  WinLink, // -flavor link
-  Darwin,  // -flavor darwin
-  Wasm,    // -flavor wasm
+  Gnu,       // -flavor gnu
+  WinLink,   // -flavor link
+  OldDarwin, // -flavor old-darwin
+  Wasm,      // -flavor wasm
 };
 
 LLVM_ATTRIBUTE_NORETURN static void die(const Twine &s) {
@@ -60,7 +60,7 @@
       .CasesLower("ld", "ld.lld", "gnu", Gnu)
       .CasesLower("wasm", "ld-wasm", Wasm)
       .CaseLower("link", WinLink)
-      .CasesLower("ld64", "ld64.lld", "darwin", Darwin)
+      .CasesLower("ld64", "ld64.lld", "old-darwin", OldDarwin)
       .Default(Invalid);
 }
 
@@ -154,7 +154,7 @@
     return !elf::link(args, canExitEarly(), llvm::outs(), llvm::errs());
   case WinLink:
     return !coff::link(args, canExitEarly(), llvm::outs(), llvm::errs());
-  case Darwin:
+  case OldDarwin:
     return !mach_o::link(args, canExitEarly(), llvm::outs(), llvm::errs());
   case Wasm:
     return !wasm::link(args, canExitEarly(), llvm::outs(), llvm::errs());