diff --git a/include/ruby/3/core/rtypeddata.h b/include/ruby/3/core/rtypeddata.h
index 21b08570fe..9ba1f363c6 100644
--- a/include/ruby/3/core/rtypeddata.h
+++ b/include/ruby/3/core/rtypeddata.h
@@ -160,8 +160,8 @@ RTYPEDDATA_TYPE(VALUE obj)
 #if ! RUBY_NDEBUG
     if (RB_UNLIKELY(! RTYPEDDATA_P(obj))) {
         rb_unexpected_type(obj, RUBY_T_DATA);
-# if ! defined(__sun) && ! RUBY3_COMPILER_IS(Intel)
-        RUBY3_UNREACHABLE_RETURN(NULL);
+# if ! defined(__sun)
+        RUBY3_UNREACHABLE_RETURN(0);
 # endif
     }
 #endif