diff --git a/llvm/lib/IR/LLVMContextImpl.cpp b/llvm/lib/IR/LLVMContextImpl.cpp
index c78b760..d47a0d3 100644
--- a/llvm/lib/IR/LLVMContextImpl.cpp
+++ b/llvm/lib/IR/LLVMContextImpl.cpp
@@ -142,7 +142,7 @@
     I->dropAllReferences();
 
   for (UniquableMDNode *I : DistinctMDNodes)
-    delete cast<MDTuple>(I);
+    I->deleteAsSubclass();
   for (MDTuple *I : MDTuples)
     delete I;