1 files changed, 1 insertions, 1 deletions
diff --git a/proc.c b/proc.c
index 2ac261c789..2af6d62e6b 100644
--- a/proc.c
+++ b/proc.c
@@ -92,7 +92,7 @@ proc_dup(VALUE self)
     dst->block = src->block;
     dst->block.proc = procval;
     dst->envval = src->envval;
-    dst->safe_level = dst->safe_level;
+    dst->safe_level = src->safe_level;
     dst->is_lambda = src->is_lambda;
 
     return procval;