1 files changed, 1 insertions, 0 deletions
diff --git a/vm_core.h b/vm_core.h
index 4993ef83ed..8ebdadb08a 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -1034,6 +1034,7 @@ VALUE rb_iseq_coverage(const rb_iseq_t *iseq);
 RUBY_EXTERN VALUE rb_cISeq;
 RUBY_EXTERN VALUE rb_cRubyVM;
 RUBY_EXTERN VALUE rb_mRubyVMFrozenCore;
+RUBY_EXTERN VALUE rb_block_param_proxy;
 RUBY_SYMBOL_EXPORT_END
 
 #define GetProcPtr(obj, ptr) \