diff --git a/lib/Analysis/LoadValueNumbering.cpp b/lib/Analysis/LoadValueNumbering.cpp
index 16e79a1286f..721fe47da88 100644
--- a/lib/Analysis/LoadValueNumbering.cpp
+++ b/lib/Analysis/LoadValueNumbering.cpp
@@ -328,6 +328,10 @@ void LoadVN::getEqualNumberNodes(Value *V,
       LoadInvalidatedInBBBefore = true;
       break;
     }
+    if (dyn_cast<VAArgInst>(I)) {
+      LoadInvalidatedInBBBefore = true;
+      break;
+    }
   }
 
   // Figure out if the load is invalidated between the load and the exit of the