Index: lld/COFF/Driver.cpp
===================================================================
--- lld/COFF/Driver.cpp
+++ lld/COFF/Driver.cpp
@@ -1210,7 +1210,8 @@
 
   // If the first command line argument is "/lib", link.exe acts like lib.exe.
   // We call our own implementation of lib.exe that understands bitcode files.
-  if (argsArr.size() > 1 && StringRef(argsArr[1]).equals_lower("/lib")) {
+  if (argsArr.size() > 1 && (StringRef(argsArr[1]).equals_lower("/lib") ||
+                             StringRef(argsArr[1]).equals_lower("-lib"))) {
     if (llvm::libDriverMain(argsArr.slice(1)) != 0)
       fatal("lib failed");
     return;
Index: lld/test/COFF/driver.test
===================================================================
--- lld/test/COFF/driver.test
+++ lld/test/COFF/driver.test
@@ -11,6 +11,7 @@
 BADFILE: bad file type. Did you specify a DLL instead of an import library?
 
 # RUN: lld-link /lib /help | FileCheck -check-prefix=LIBHELP %s
+# RUN: lld-link -lib -help | FileCheck -check-prefix=LIBHELP %s
 LIBHELP: OVERVIEW: LLVM Lib
 
 # RUN: env LLD_IN_TEST=1 not lld-link /WX /lib 2>&1 | FileCheck -check-prefix=LIBBAD %s