diff --git a/llvm/lib/Analysis/LazyValueInfo.cpp b/llvm/lib/Analysis/LazyValueInfo.cpp
index 0bdd158970dc7..b4d64536a5aca 100644
--- a/llvm/lib/Analysis/LazyValueInfo.cpp
+++ b/llvm/lib/Analysis/LazyValueInfo.cpp
@@ -854,7 +854,7 @@ void LazyValueInfoImpl::intersectAssumeOrGuardBlockValueConstantRange(
           if (auto *CI = dyn_cast<ConstantInt>(RK.IRArgValue);
               CI && !CI->isZero())
             BBLV = BBLV.intersect(ValueLatticeElement::getNot(
-                Constant::getNullValue(RK.IRArgValue->getType())));
+                Constant::getNullValue(RK.WasOn->getType())));
           break;
 
         default: