1 files changed, 1 insertions, 0 deletions
diff --git a/env.h b/env.h
index f150f7fb63..196090f387 100644
--- a/env.h
+++ b/env.h
@@ -43,6 +43,7 @@ extern struct SCOPE {
 #define SCOPE_MALLOC  1
 #define SCOPE_NOSTACK 2
 #define SCOPE_DONT_RECYCLE 4
+#define SCOPE_CLONE   8
 
 extern int ruby_in_eval;