diff --git a/src/algorithms/libs/rtklib/rtklib_rtksvr.cc b/src/algorithms/libs/rtklib/rtklib_rtksvr.cc
index c8ba20466..0c2aabedf 100644
--- a/src/algorithms/libs/rtklib/rtklib_rtksvr.cc
+++ b/src/algorithms/libs/rtklib/rtklib_rtksvr.cc
@@ -752,8 +752,8 @@ int rtksvrstart(rtksvr_t *svr, int cycle, int buffsize, int *strs,
             init_rtcm(svr->rtcm+i);
 
             /* set receiver and rtcm option */
-            strcpy(svr->raw [i].opt, rcvopts[i]);
-            strcpy(svr->rtcm[i].opt, rcvopts[i]);
+            if(strlen(rcvopts[i]) < 256 ) strcpy(svr->raw [i].opt, rcvopts[i]);
+            if(strlen(rcvopts[i]) < 256 ) strcpy(svr->rtcm[i].opt, rcvopts[i]);
 
             /* connect dgps corrections */
             svr->rtcm[i].dgps = svr->nav.dgps;
diff --git a/src/algorithms/libs/rtklib/rtklib_stream.cc b/src/algorithms/libs/rtklib/rtklib_stream.cc
index 70c9ee552..53d2bb8f4 100644
--- a/src/algorithms/libs/rtklib/rtklib_stream.cc
+++ b/src/algorithms/libs/rtklib/rtklib_stream.cc
@@ -861,7 +861,7 @@ int accsock(tcpsvr_t *tcpsvr, char *msg)
     tcpsvr->cli[i].sock = sock;
     if (!setsock(tcpsvr->cli[i].sock, msg)) return 0;
     memcpy(&tcpsvr->cli[i].addr, &addr, sizeof(addr));
-    strcpy(tcpsvr->cli[i].saddr, inet_ntoa(addr.sin_addr));
+    if(strlen(inet_ntoa(addr.sin_addr)) < 256) strcpy(tcpsvr->cli[i].saddr, inet_ntoa(addr.sin_addr));
     sprintf(msg, "%s", tcpsvr->cli[i].saddr);
     tracet(2, "accsock: connected sock=%d addr=%s\n", tcpsvr->cli[i].sock, tcpsvr->cli[i].saddr);
     tcpsvr->cli[i].state = 2;