diff --git a/Makefile b/Makefile
index de7e063..1acde7c 100644
--- a/Makefile
+++ b/Makefile
@@ -53,7 +53,7 @@ TEST_LOGGER=./src/logger/lib/test/main.c
 LIBS_LOGGER=$(LIB_CORE)
 LIB_LOGGER=-l$(PROJECT_NAME)-logger
 
-LIBS_CHAT=$(LIB_CORE)
+LIBS_CHAT=$(LIB_CORE) -lpthread
 
 # Install Files
 INSTALL_INCLUDE=/usr/include
diff --git a/src/chat/server/main.c b/src/chat/server/main.c
index 6bfd2dd..3efb3bf 100644
--- a/src/chat/server/main.c
+++ b/src/chat/server/main.c
@@ -19,6 +19,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #include <why2/chat/common.h>
 
 #include <unistd.h>
+#include <time.h>
 
 char *read_socket(int socket);
 void *communicate_thread(void *arg);