diff --git a/epan/dissectors/asn1/rrc/rrc.cnf b/epan/dissectors/asn1/rrc/rrc.cnf
index 791a76dfa2..058e8e03aa 100644
--- a/epan/dissectors/asn1/rrc/rrc.cnf
+++ b/epan/dissectors/asn1/rrc/rrc.cnf
@@ -901,7 +901,7 @@ HandoverFromUTRANCommand-GSM-r6-IEs/gsm-message/single-GSM-Message single-GSM-Me
         /* Concat MCC and MNC in temp buffer */
         temp_strbuf = wmem_strbuf_sized_new(actx->pinfo->pool,7,7);
         wmem_strbuf_append_printf(temp_strbuf,"%%s",wmem_strbuf_get_str(last_mcc_strbuf));
-        wmem_strbuf_append_printf(temp_strbuf,"%%s",wmem_strbuf_get_str(mcc_mnc_strbuf));
+        wmem_strbuf_append_printf(temp_strbuf,"%%s",mcc_mnc_string);
         /* Update length of recovered MCC-MNC pair */
         string_len = (guint32)wmem_strbuf_get_len(temp_strbuf);
         mcc_mnc_string = wmem_strbuf_finalize(temp_strbuf);
diff --git a/epan/dissectors/packet-rrc.c b/epan/dissectors/packet-rrc.c
index e113ebb3f3..6422582156 100644
--- a/epan/dissectors/packet-rrc.c
+++ b/epan/dissectors/packet-rrc.c
@@ -135861,7 +135861,7 @@ dissect_rrc_PLMN_IdentityWithOptionalMCC_r6(tvbuff_t *tvb _U_, int offset _U_, a
         /* Concat MCC and MNC in temp buffer */
         temp_strbuf = wmem_strbuf_sized_new(actx->pinfo->pool,7,7);
         wmem_strbuf_append_printf(temp_strbuf,"%s",wmem_strbuf_get_str(last_mcc_strbuf));
-        wmem_strbuf_append_printf(temp_strbuf,"%s",wmem_strbuf_get_str(mcc_mnc_strbuf));
+        wmem_strbuf_append_printf(temp_strbuf,"%s",mcc_mnc_string);
         /* Update length of recovered MCC-MNC pair */
         string_len = (guint32)wmem_strbuf_get_len(temp_strbuf);
         mcc_mnc_string = wmem_strbuf_finalize(temp_strbuf);