diff --git a/lib/Transforms/Scalar/GVNHoist.cpp b/lib/Transforms/Scalar/GVNHoist.cpp
index 8f26a3206d9e..19b8dd769421 100644
--- a/lib/Transforms/Scalar/GVNHoist.cpp
+++ b/lib/Transforms/Scalar/GVNHoist.cpp
@@ -74,7 +74,7 @@ struct SortByDFSIn {
 
     unsigned ADFS = DFSNumber.lookup(A);
     unsigned BDFS = DFSNumber.lookup(B);
-    assert (ADFS && ADFS);
+    assert (ADFS && BDFS);
     return ADFS < BDFS;
   }
 };