diff --git a/src/lib/utils/tcpsocket.cpp b/src/lib/utils/tcpsocket.cpp
index f6a752d7..d33dc709 100755
--- a/src/lib/utils/tcpsocket.cpp
+++ b/src/lib/utils/tcpsocket.cpp
@@ -25,6 +25,7 @@
 #include <arpa/inet.h>
 #include <netdb.h>
 #include <string.h>
+#include <errno.h>
 #ifdef HAVE_PPOLL
 #  include <poll.h>
 #endif