diff --git a/misc/ss.c b/misc/ss.c
index 9e821faf..766fdc5f 100644
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -51,6 +51,14 @@
 #include <linux/tipc_netlink.h>
 #include <linux/tipc_sockets_diag.h>
 
+/* AF_VSOCK/PF_VSOCK is only provided since glibc 2.18 */
+#ifndef PF_VSOCK
+#define PF_VSOCK 40
+#endif
+#ifndef AF_VSOCK
+#define AF_VSOCK PF_VSOCK
+#endif
+
 #define MAGIC_SEQ 123456
 #define BUF_CHUNK (1024 * 1024)
 #define LEN_ALIGN(x) (((x) + 1) & ~1)