diff --git a/llvm/lib/CodeGen/MachineDominators.cpp b/llvm/lib/CodeGen/MachineDominators.cpp
index 845e823..fcfa574e 100644
--- a/llvm/lib/CodeGen/MachineDominators.cpp
+++ b/llvm/lib/CodeGen/MachineDominators.cpp
@@ -26,7 +26,7 @@
 static bool VerifyMachineDomInfo = false;
 #endif
 static cl::opt<bool, true> VerifyMachineDomInfoX(
-    "verify-machine-dom-info", cl::location(VerifyMachineDomInfo),
+    "verify-machine-dom-info", cl::location(VerifyMachineDomInfo), cl::Hidden,
     cl::desc("Verify machine dominator info (time consuming)"));
 
 namespace llvm {