diff --git a/src/nmstermio.c b/src/nmstermio.c
index e2815fa..69cf98e 100644
--- a/src/nmstermio.c
+++ b/src/nmstermio.c
@@ -17,6 +17,9 @@
 #include <termios.h>
 #include <unistd.h>
 #include <sys/ioctl.h>
+#ifndef FIONREAD
+#include <sys/socket.h>
+#endif
 
 // Macros for VT100 codes
 #define CLEAR_SCR()          printf("\033[2J")           // Clear Screen