diff --git a/lib/include/srslte/common/pcap.h b/lib/include/srslte/common/pcap.h
index d9937c060..db1dc17d0 100644
--- a/lib/include/srslte/common/pcap.h
+++ b/lib/include/srslte/common/pcap.h
@@ -80,8 +80,9 @@ typedef struct pcaprec_hdr_s {
 #define MAC_LTE_UEID_TAG            0x03
 /* 2 bytes, network order */
 
-#define MAC_LTE_SUBFRAME_TAG        0x04
+#define MAC_LTE_FRAME_SUBFRAME_TAG  0x04
 /* 2 bytes, network order */
+/* SFN is stored in 12 MSB and SF in 4 LSB */
 
 #define MAC_LTE_PREDFINED_DATA_TAG  0x05
 /* 1 byte */
@@ -150,7 +151,7 @@ inline int MAC_LTE_PCAP_WritePDU(FILE *fd, MAC_Context_Info_t *context,
     pcaprec_hdr_t packet_header;
     char context_header[256];
     int offset = 0;
-    unsigned short tmp16;
+    uint16_t tmp16;
 
     /* Can't write if file wasn't successfully opened */
     if (fd == NULL) {
@@ -176,9 +177,11 @@ inline int MAC_LTE_PCAP_WritePDU(FILE *fd, MAC_Context_Info_t *context,
     memcpy(context_header+offset, &tmp16, 2);
     offset += 2;
 
-    /* Subframe number */
-    context_header[offset++] = MAC_LTE_SUBFRAME_TAG;
-    tmp16 = htons(context->subFrameNumber);
+    /* Subframe Number and System Frame Number */
+    /* SFN is stored in 12 MSB and SF in 4 LSB */
+    context_header[offset++] = MAC_LTE_FRAME_SUBFRAME_TAG;
+    tmp16 = (context->sysFrameNumber << 4) | context->subFrameNumber;
+    tmp16 = htons(tmp16);
     memcpy(context_header+offset, &tmp16, 2);
     offset += 2;
 
@@ -215,4 +218,4 @@ inline void MAC_LTE_PCAP_Close(FILE *fd)
     fclose(fd);
 }
 
-#endif /* UEPCAP_H */
\ No newline at end of file
+#endif /* UEPCAP_H */
diff --git a/srsenb/src/enb_cfg_parser.cc b/srsenb/src/enb_cfg_parser.cc
index 3beb85a65..00f01d498 100644
--- a/srsenb/src/enb_cfg_parser.cc
+++ b/srsenb/src/enb_cfg_parser.cc
@@ -749,7 +749,7 @@ int enb::parse_sibs(all_args_t *args, rrc_cfg_t *rrc_cfg, phy_cfg_t *phy_config_
   }
   
   // Fill rest of data from enb config 
-  sib1->cell_id = args->enb.s1ap.enb_id;
+  sib1->cell_id = (args->enb.s1ap.enb_id << 8) + args->enb.s1ap.cell_id;
   sib1->tracking_area_code = args->enb.s1ap.tac;
   sib1->freq_band_indicator = srslte_band_get_band(args->rf.dl_earfcn); 
   sib1->N_plmn_ids = 1;