diff --git a/networking/ifenslave.c b/networking/ifenslave.c
index 89a3f9e80..ae9745726 100644
--- a/networking/ifenslave.c
+++ b/networking/ifenslave.c
@@ -100,11 +100,15 @@
 
 #include "libbb.h"
 
-#include <net/if.h>
+/* #include <net/if.h> - no. linux/if_bonding.h pulls in linux/if.h */
 #include <net/if_arp.h>
 #include <linux/if_bonding.h>
 #include <linux/sockios.h>
 
+#ifndef IFNAMSIZ
+#define IFNAMSIZ 16
+#endif
+
 typedef uint64_t u64; /* hack, so we may include kernel's ethtool.h */
 typedef uint32_t u32; /* ditto */
 typedef uint16_t u16; /* ditto */