1 files changed, 1 insertions, 0 deletions

diff --git a/env.h b/env.h
index ebcfcc5d31..b254ddef1c 100644
--- a/env.h
+++ b/env.h
@@ -12,6 +12,7 @@
 #define ENV_H
 
 extern struct FRAME {
+    VALUE self;
     int argc;
     VALUE *argv;
     ID last_func;