diff --git a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c
index 4f675fecc4..9d0365d5ff 100644
--- a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c
+++ b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c
@@ -1350,7 +1350,7 @@ void nr_update_pucch_scheduling(int Mod_idP,
   }
   else {  // to be tested
     curr_pucch = UE_list->UE_sched_ctrl[UE_id].sched_pucch;
-    if (curr_pucch->dai_c<11) {     // we are scheduling at most 11 harq-ack in the same pucch
+    if (curr_pucch->dai_c<MAX_ACK_BITS) {     // we are scheduling at most MAX_UCI_BITS harq-ack in the same pucch
       while (i<8 && found == 0)  {  // look if timing indicator is among allowed values for current pucch
         if (pdsch_to_harq_feedback[i]==(curr_pucch->ul_slot % slots_per_tdd)-(slotP % slots_per_tdd))
           found = 1;
@@ -1362,7 +1362,7 @@ void nr_update_pucch_scheduling(int Mod_idP,
         sched_pucch->timing_indicator = pdsch_to_harq_feedback[i];
       }
     }
-    if (curr_pucch->dai_c==11 || found == 0) { // if current pucch is full or no timing indicator allowed
+    if (curr_pucch->dai_c==MAX_ACK_BITS || found == 0) { // if current pucch is full or no timing indicator allowed
       // look for pucch occasions in other UL of mixed slots
       for (k=scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofDownlinkSlots; k<slots_per_tdd; k++) { // for each possible UL or mixed slot
         if (k!=(curr_pucch->ul_slot % slots_per_tdd)) { // skip current scheduled slot (already checked)
@@ -1396,7 +1396,7 @@ void nr_update_pucch_scheduling(int Mod_idP,
                 curr_pucch->next_sched_pucch = sched_pucch;
               }
               else {
-                if (curr_pucch->dai_c==11)
+                if (curr_pucch->dai_c==MAX_ACK_BITS)
                   found = 0; // if pucch at index k is already full we have to find a new one in a following occasion
                 else { // scheduling this harq-ack in current pucch
                   sched_pucch = curr_pucch;
diff --git a/openair2/LAYER2/NR_MAC_gNB/mac_proto.h b/openair2/LAYER2/NR_MAC_gNB/mac_proto.h
index cbbac3a55a..657de416a9 100644
--- a/openair2/LAYER2/NR_MAC_gNB/mac_proto.h
+++ b/openair2/LAYER2/NR_MAC_gNB/mac_proto.h
@@ -34,6 +34,8 @@
 #include "nr_mac_gNB.h"
 #include "PHY/defs_gNB.h"
 
+#define MAX_ACK_BITS 2 //only format 0 is available for now
+
 void set_cset_offset(uint16_t);
 
 void mac_top_init_gNB(void);