diff --git a/lib/include/srslte/upper/rlc_am.h b/lib/include/srslte/upper/rlc_am.h
index d18cc94d4..ac04c991a 100644
--- a/lib/include/srslte/upper/rlc_am.h
+++ b/lib/include/srslte/upper/rlc_am.h
@@ -69,7 +69,7 @@ struct rlc_amd_retx_t{
 class rlc_am : public rlc_common
 {
 public:
-  rlc_am(uint32_t queue_len = 16);
+  rlc_am(uint32_t queue_len = 128);
   ~rlc_am();
   void init(log                   *log_,
             uint32_t              lcid_,
diff --git a/lib/include/srslte/upper/rlc_um.h b/lib/include/srslte/upper/rlc_um.h
index f866417d2..e47df8e73 100644
--- a/lib/include/srslte/upper/rlc_um.h
+++ b/lib/include/srslte/upper/rlc_um.h
@@ -48,7 +48,7 @@ class rlc_um
     :public rlc_common
 {
 public:
-  rlc_um(uint32_t queue_len = 32);
+  rlc_um(uint32_t queue_len = 128);
   ~rlc_um();
   void init(log                       *rlc_entity_log_,
             uint32_t                   lcid_,