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) \
diff --git a/vm_insnhelper.h b/vm_insnhelper.h
index 59c82e5d76..98aee9d46c 100644
--- a/vm_insnhelper.h
+++ b/vm_insnhelper.h
@@ -14,8 +14,6 @@
 
 RUBY_SYMBOL_EXPORT_BEGIN
 
-RUBY_EXTERN VALUE rb_block_param_proxy;
-
 RUBY_EXTERN VALUE ruby_vm_const_missing_count;
 RUBY_EXTERN rb_serial_t ruby_vm_global_method_state;
 RUBY_EXTERN rb_serial_t ruby_vm_global_constant_state;