diff --git a/src/network.c b/src/network.c
index 637ed17..55799ee 100644
--- a/src/network.c
+++ b/src/network.c
@@ -8,6 +8,11 @@
 #include <netdb.h>
 #include <unistd.h>
 #include <stdio.h>
+
+// Needed for sigaction on Linux
+#ifdef __linux__
+#define _POSIX_C_SOURCE 1
+#endif // __linux__
 #include <signal.h>
 
 #include "lfnetwork.h"