diff --git a/build.sh b/build.sh
index 1348053..811abc7 100755
--- a/build.sh
+++ b/build.sh
@@ -3,7 +3,8 @@
 ENGINE=ULOG2
 #ENGINE=PCAP
 
-LIBS=""
+# we use C++ 11 threads. We must include pthread library due gcc bug
+LIBS="-l pthread"
 
 if [ "PCAP" == $ENGINE ]; then
     LIBS="$LIBS -lpcap"
@@ -21,4 +22,4 @@ fi
 
 g++ libipulog.c -c -o libipulog.o -Wno-write-strings
 # -std=c++11 
-g++ -DREDIS -D$ENGINE fastnetmon.cpp libipulog.o $LIBS -o fastnetmon -g
+g++ -DREDIS -D$ENGINE fastnetmon.cpp libipulog.o $LIBS -o fastnetmon  -std=c++11 -lpthread -g
diff --git a/fastnetmon.cpp b/fastnetmon.cpp
index 044d2ff..8032fb6 100644
--- a/fastnetmon.cpp
+++ b/fastnetmon.cpp
@@ -35,7 +35,7 @@
 #include <utility>
 #include <sstream>
 
-//#include <thread>
+#include <thread>
 
 // #include <boost/thread.hpp> - выливается в падение компилятора
 // for boost split
@@ -646,7 +646,9 @@ void parse_packet(u_char *user, struct pcap_pkthdr *packethdr, const u_char *pac
 void calculation_programm() {
     time_t current_time;
     time(&current_time);
-   
+ 
+    //sleep(5);
+ 
     // вынести в поток!!! 
     if ( difftime(current_time, start_time) >= check_period ) {
         // clean up screen