diff --git a/lib/src/rlc/rlc_am_nr_packing.cc b/lib/src/rlc/rlc_am_nr_packing.cc
index ea8617fa7..d5ca80e33 100644
--- a/lib/src/rlc/rlc_am_nr_packing.cc
+++ b/lib/src/rlc/rlc_am_nr_packing.cc
@@ -140,9 +140,9 @@ bool rlc_am_nr_status_pdu_t::trim(uint32_t max_packed_size)
 
 void rlc_am_nr_status_pdu_t::refresh_packed_size()
 {
-  uint32_t packed_size = rlc_am_nr_status_pdu_sizeof_header_ack_sn;
+  packed_size_ = rlc_am_nr_status_pdu_sizeof_header_ack_sn;
   for (auto nack : nacks_) {
-    packed_size += nack_size(nack);
+    packed_size_ += nack_size(nack);
   }
 }