1 files changed, 0 insertions, 1 deletions
diff --git a/iseq.h b/iseq.h
index b12228eed9..42ddb05147 100644
--- a/iseq.h
+++ b/iseq.h
@@ -226,7 +226,6 @@ struct rb_compile_option_struct {
     unsigned int specialized_instruction: 1;
     unsigned int operands_unification: 1;
     unsigned int instructions_unification: 1;
-    unsigned int stack_caching: 1;
     unsigned int frozen_string_literal: 1;
     unsigned int debug_frozen_string_literal: 1;
     unsigned int coverage_enabled: 1;