diff --git a/build_opts/NULL_All_Ruby b/build_opts/NULL_ALL_RUBY
similarity index 100%
rename from build_opts/NULL_All_Ruby
rename to build_opts/NULL_ALL_RUBY
diff --git a/ext/testlib/configuration.py b/ext/testlib/configuration.py
index 53d4476aec..92a9df85f0 100644
--- a/ext/testlib/configuration.py
+++ b/ext/testlib/configuration.py
@@ -253,6 +253,7 @@ def define_constants(constants):
     constants.power_tag = "POWER"
     constants.null_tag = "NULL"
     constants.all_compiled_tag = "ALL"
+    constants.null_all_ruby = "NULL_All_Ruby"
 
     constants.variant_tag_type = "variant"
     constants.opt_tag = "opt"