diff --git a/llvm/docs/CommandGuide/llvm-objdump.rst b/llvm/docs/CommandGuide/llvm-objdump.rst
--- a/llvm/docs/CommandGuide/llvm-objdump.rst
+++ b/llvm/docs/CommandGuide/llvm-objdump.rst
@@ -156,7 +156,7 @@
 
 .. option:: --mattr=<a1,+a2,-a3,...>
 
-  Enable/disable target-specific attributes. Specify ``--mcpu=help`` to display
+  Enable/disable target-specific attributes. Specify ``--mattr=help`` to display
   the available attributes.
 
 .. option:: --no-leading-addr
diff --git a/llvm/tools/llvm-objdump/llvm-objdump.cpp b/llvm/tools/llvm-objdump/llvm-objdump.cpp
--- a/llvm/tools/llvm-objdump/llvm-objdump.cpp
+++ b/llvm/tools/llvm-objdump/llvm-objdump.cpp
@@ -226,11 +226,11 @@
                         cl::Grouping, cl::aliasopt(MachOOpt));
 
 cl::opt<std::string> objdump::MCPU(
-    "mcpu", cl::desc("Target a specific cpu type (-mcpu=help for details)"),
+    "mcpu", cl::desc("Target a specific cpu type (--mcpu=help for details)"),
     cl::value_desc("cpu-name"), cl::init(""), cl::cat(ObjdumpCat));
 
 cl::list<std::string> objdump::MAttrs("mattr", cl::CommaSeparated,
-                                      cl::desc("Target specific attributes"),
+                                      cl::desc("Target specific attributes (--mattr=help for details)"),
                                       cl::value_desc("a1,+a2,-a3,..."),
                                       cl::cat(ObjdumpCat));