Index: test/tools/llvm-dwarfdump/cmdline.test
===================================================================
--- test/tools/llvm-dwarfdump/cmdline.test
+++ test/tools/llvm-dwarfdump/cmdline.test
@@ -13,6 +13,7 @@
 HELP: -ignore-case
 HELP: -lookup
 HELP: -name
+HELP: -out-file=<filename>
 HELP: -parent-recurse-depth=<N>
 HELP: -recurse-depth=<N>
 HELP: -regex
Index: tools/llvm-dwarfdump/llvm-dwarfdump.cpp
===================================================================
--- tools/llvm-dwarfdump/llvm-dwarfdump.cpp
+++ tools/llvm-dwarfdump/llvm-dwarfdump.cpp
@@ -162,7 +162,7 @@
 static opt<std::string>
     OutputFilename("out-file", cl::init("-"),
                    cl::desc("Redirect output to the specified file."),
-                   cl::value_desc("filename"));
+                   cl::value_desc("filename"), cat(DwarfDumpCategory));
 static alias OutputFilenameAlias("o", desc("Alias for -out-file."),
                                  aliasopt(OutputFilename),
                                  cat(DwarfDumpCategory));