1 files changed, 1 insertions, 0 deletions

diff --git a/src/lib/libc/net/if_indextoname.c b/src/lib/libc/net/if_indextoname.c
index 0b71010ace..4b38f851a1 100644
--- a/src/lib/libc/net/if_indextoname.c
+++ b/src/lib/libc/net/if_indextoname.c
@@ -38,6 +38,7 @@
 #include <net/if.h>
 #include <net/if_dl.h>
 #include <errno.h>
+#include <unistd.h>
 #include <string.h>
 
 static char __name[IFNAMSIZ];