diff --git a/llvm/tools/llvm-readobj/llvm-readobj.cpp b/llvm/tools/llvm-readobj/llvm-readobj.cpp
index 14f8dae..161a290 100644
--- a/llvm/tools/llvm-readobj/llvm-readobj.cpp
+++ b/llvm/tools/llvm-readobj/llvm-readobj.cpp
@@ -688,7 +688,7 @@
     StringRef ArgName = OptEntry.getKey();
     cl::Option *Option = OptEntry.getValue();
     if (ArgName.size() == 1)
-      Option->setFormattingFlag(cl::Grouping);
+      apply(Option, cl::Grouping);
   }
 }