diff --git a/src/sigar_format.c b/src/sigar_format.c
index f0eb00d6..610b036b 100644
--- a/src/sigar_format.c
+++ b/src/sigar_format.c
@@ -28,7 +28,7 @@
 
 #ifndef WIN32
 #include <arpa/inet.h>
-#ifdef __OpenBSD__
+#if defined(__OpenBSD__) || defined(__FreeBSD__)
 #include <sys/socket.h>
 #endif
 #include <pwd.h>