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-rw-r--r--sysdeps/mach/hurd/if_index.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/if_index.c b/sysdeps/mach/hurd/if_index.c
index 32dceccdbf..30b41ef396 100644
--- a/sysdeps/mach/hurd/if_index.c
+++ b/sysdeps/mach/hurd/if_index.c
@@ -19,6 +19,7 @@
 #include <error.h>
 #include <net/if.h>
 #include <string.h>
+#include <sys/socket.h>
 #include <sys/ioctl.h>
 #include <unistd.h>