diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
--- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -1890,6 +1890,8 @@
       if (!ResultTy ||
           !PointerType::isValidElementType(ResultTy))
         return error("Invalid type");
+      if (LLVM_UNLIKELY(!Context.hasSetOpaquePointersValue()))
+        Context.setOpaquePointers(false);
       ContainedIDs.push_back(Record[0]);
       ResultTy = PointerType::get(ResultTy, AddressSpace);
       break;