diff --git a/libcxxabi/src/private_typeinfo.cpp b/libcxxabi/src/private_typeinfo.cpp
index 2f631041f74c..01a1d2603b18 100644
--- a/libcxxabi/src/private_typeinfo.cpp
+++ b/libcxxabi/src/private_typeinfo.cpp
@@ -591,10 +591,9 @@ __base_class_type_info::has_unambiguous_public_base(__dynamic_cast_info* info,
     // .. and reset the pointer.
     adjustedPtr = nullptr;
   }
-    __base_type->has_unambiguous_public_base(
-            info,
-            static_cast<char*>(adjustedPtr) + offset_to_base,
-            (__offset_flags & __public_mask) ? path_below : not_public_path);
+  __base_type->has_unambiguous_public_base(
+      info, reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(adjustedPtr) + offset_to_base),
+      (__offset_flags & __public_mask) ? path_below : not_public_path);
 }
 
 void