diff --git a/openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h b/openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h
index e0cf53c5a0..420445076f 100644
--- a/openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h
+++ b/openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h
@@ -842,7 +842,7 @@ typedef struct gNB_MAC_INST_s {
   NR_COMMON_channels_t common_channels[NFAPI_CC_MAX];
   /// current PDU index (BCH,DLSCH)
   uint16_t pdu_index[NFAPI_CC_MAX];
-  int num_ulprbbl;
+  /// UL PRBs blacklist
   uint16_t ulprbbl[MAX_BWP_SIZE];
   /// NFAPI Config Request Structure
   nfapi_nr_config_request_scf_t     config[NFAPI_CC_MAX];