diff --git a/llvm/lib/IR/Verifier.cpp b/llvm/lib/IR/Verifier.cpp
index 100e881c8fa81..c408ad67cdc07 100644
--- a/llvm/lib/IR/Verifier.cpp
+++ b/llvm/lib/IR/Verifier.cpp
@@ -116,7 +116,7 @@
 using namespace llvm;
 
 static cl::opt<bool> VerifyNoAliasScopeDomination(
-    "verify-noalias-scope-decl-dom", cl::Hidden, cl::init(false),
+    "verify-noalias-scope-decl-dom", cl::Hidden, cl::init(true),
     cl::desc("Ensure that llvm.experimental.noalias.scope.decl for identical "
              "scopes are not dominating"));