diff --git a/openair1/PHY/NR_UE_TRANSPORT/dci_nr.c b/openair1/PHY/NR_UE_TRANSPORT/dci_nr.c
index 53456bb691..64dc8f5950 100644
--- a/openair1/PHY/NR_UE_TRANSPORT/dci_nr.c
+++ b/openair1/PHY/NR_UE_TRANSPORT/dci_nr.c
@@ -373,7 +373,10 @@ void nr_pdcch_extract_rbs_single(int32_t **rxdataF,
     for (int rb=0;rb<coreset_nbr_rb;rb++,c_rb++) {
       c_rb_by6 = c_rb/6;
       // skip zeros in frequency domain bitmap
-      while ((coreset_freq_dom[c_rb_by6>>3] & (1<<(c_rb_by6&7))) == 0) c_rb+=6;
+      while ((coreset_freq_dom[c_rb_by6>>3] & (1<<(7-(c_rb_by6&7)))) == 0) {
+	  c_rb+=6;
+	  c_rb_by6 = c_rb/6;
+	}
 
       LOG_DDD("c_rb=%d\n",c_rb);
       rxF=NULL;