diff --git a/srsenb/src/stack/mac/scheduler_grid.cc b/srsenb/src/stack/mac/scheduler_grid.cc
index d91be7a19..dce1a9c77 100644
--- a/srsenb/src/stack/mac/scheduler_grid.cc
+++ b/srsenb/src/stack/mac/scheduler_grid.cc
@@ -852,7 +852,7 @@ alloc_outcome_t sf_sched::alloc_ul_user(sched_ue* user, prb_interval alloc)
   bool               has_retx = h->has_pending_retx();
   if (has_retx) {
     prb_interval prev_alloc = h->get_alloc();
-    if (prev_alloc == alloc) {
+    if (prev_alloc == alloc and h->has_pending_ack()) {
       alloc_type = ul_alloc_t::NOADAPT_RETX;
     } else {
       alloc_type = ul_alloc_t::ADAPT_RETX;
diff --git a/srsenb/src/stack/mac/scheduler_harq.cc b/srsenb/src/stack/mac/scheduler_harq.cc
index f708d6ca6..9157296c5 100644
--- a/srsenb/src/stack/mac/scheduler_harq.cc
+++ b/srsenb/src/stack/mac/scheduler_harq.cc
@@ -255,7 +255,8 @@ void ul_harq_proc::new_tx(uint32_t tti_, int mcs, int tbs, prb_interval alloc, u
 
 void ul_harq_proc::new_retx(uint32_t tb_idx, uint32_t tti_, int* mcs, int* tbs, prb_interval alloc)
 {
-  is_adaptive = alloc != allocation;
+  // If PRBs changed, or there was no CRC (e.g. HARQ is being resumed)
+  is_adaptive = alloc != allocation or not has_pending_ack();
   allocation  = alloc;
   new_retx_common(tb_idx, tti_point{tti_}, mcs, tbs);
 }