diff --git a/extern/drgn b/extern/drgn
index de24803..b1f8c3e 160000
--- a/extern/drgn
+++ b/extern/drgn
@@ -1 +1 @@
-Subproject commit de2480353e73a48063f4eca4b620d72e80e5246f
+Subproject commit b1f8c3e8526611b6720800250ba858a713dd9e4f
diff --git a/oi/Serialize.cpp b/oi/Serialize.cpp
index ecfa0c8..cd10f4f 100644
--- a/oi/Serialize.cpp
+++ b/oi/Serialize.cpp
@@ -281,7 +281,9 @@ void serialize(Archive& ar,
   // and `num_parents` set to NULL/0 per the initial `memset`, see
   // "AVOIDING OVERSERIALIZATION" comment above
 
-  ar& type._private.die_addr;
+  uintptr_t die_addr = (uintptr_t)type._private.die_addr;
+  ar& die_addr;
+  type._private.die_addr = (void*)die_addr;
   // `.module` is NULL, per the initial `memset`
   if (Archive::is_saving::value) {
     struct drgn_error* err = drgn_type_sizeof(&type, &type._private.oi_size);
diff --git a/oi/Serialize.h b/oi/Serialize.h
index 313a021..5768545 100644
--- a/oi/Serialize.h
+++ b/oi/Serialize.h
@@ -45,7 +45,7 @@ DEFINE_TYPE_VERSION(FuncDesc::Retval, 56, 2)
 DEFINE_TYPE_VERSION(FuncDesc::Range, 16, 2)
 DEFINE_TYPE_VERSION(FuncDesc, 104, 4)
 DEFINE_TYPE_VERSION(GlobalDesc, 72, 4)
-DEFINE_TYPE_VERSION(struct drgn_type, 152, 4)
+DEFINE_TYPE_VERSION(struct drgn_type, 160, 4)
 DEFINE_TYPE_VERSION(DrgnClassMemberInfo, 64, 3)
 DEFINE_TYPE_VERSION(struct drgn_qualified_type, 16, 2)
 DEFINE_TYPE_VERSION(RootInfo, 48, 2)