diff --git a/llvm/lib/Bitcode/Reader/MetadataLoader.cpp b/llvm/lib/Bitcode/Reader/MetadataLoader.cpp
index 049164c..4da51dd 100644
--- a/llvm/lib/Bitcode/Reader/MetadataLoader.cpp
+++ b/llvm/lib/Bitcode/Reader/MetadataLoader.cpp
@@ -515,7 +515,7 @@
       GV.getMetadata(LLVMContext::MD_dbg, MDs);
       GV.eraseMetadata(LLVMContext::MD_dbg);
       for (auto *MD : MDs)
-        if (auto *DGV = dyn_cast_or_null<DIGlobalVariable>(MD)) {
+        if (auto *DGV = dyn_cast<DIGlobalVariable>(MD)) {
           auto *DGVE = DIGlobalVariableExpression::getDistinct(
               Context, DGV, DIExpression::get(Context, {}));
           GV.addMetadata(LLVMContext::MD_dbg, *DGVE);