1 files changed, 1 insertions, 0 deletions
diff --git a/iseq.h b/iseq.h
index 13d2f2630c..699524f17f 100644
--- a/iseq.h
+++ b/iseq.h
@@ -67,6 +67,7 @@ struct rb_compile_option_struct {
     int stack_caching;
     int trace_instruction;
     int frozen_string_literal;
+    int frozen_string_literal_debug;
     int debug_level;
 };