diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index e23670d..4c7cb8f 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -1219,7 +1219,7 @@
     DIScope Scope = DLT.getScope();
     OS << " dbg:";
     // Omit the directory, since it's usually long and uninteresting.
-    if (!Scope.isNull())
+    if (Scope.Verify())
       OS << Scope.getFilename();
     else
       OS << "<unknown>";