diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 58f029fbe9f..7ee06fc153b 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -659,7 +659,7 @@ void SelectionDAGISel::CodeGenAndEmitDAG() {
   (void)BlockNumber;
   bool MatchFilterBB = false; (void)MatchFilterBB;
 #ifndef NDEBUG
-  MatchFilterBB = (!FilterDAGBasicBlockName.empty() &&
+  MatchFilterBB = (FilterDAGBasicBlockName.empty() ||
                    FilterDAGBasicBlockName ==
                        FuncInfo->MBB->getBasicBlock()->getName().str());
 #endif