diff --git a/lib/IR/Verifier.cpp b/lib/IR/Verifier.cpp
index a1b5327..c3bc733 100644
--- a/lib/IR/Verifier.cpp
+++ b/lib/IR/Verifier.cpp
@@ -1666,7 +1666,7 @@
 
   if (Attrs.hasAttribute(Attribute::ByVal) && Attrs.getByValType()) {
     Assert(Attrs.getByValType() == cast<PointerType>(Ty)->getElementType(),
-           "Attribute 'byval' type does not match parameter!");
+           "Attribute 'byval' type does not match parameter!", V);
   }
 
   AttrBuilder IncompatibleAttrs = AttributeFuncs::typeIncompatible(Ty);