1 files changed, 1 insertions, 0 deletions
diff --git a/proc.c b/proc.c
index d685fe289d..6370904109 100644
--- a/proc.c
+++ b/proc.c
@@ -601,6 +601,7 @@ proc_new(VALUE klass, int8_t is_lambda)
 	if (RUBY_VM_IFUNC_P(procval)) {
 	    VALUE newprocval = rb_proc_alloc(klass);
 	    rb_proc_t *proc = RTYPEDDATA_DATA(newprocval);
+	    proc->block = *block;
 	    proc->block.iseq = (rb_iseq_t *)procval;
 	    proc->block.proc = newprocval;
 	    return newprocval;