diff --git a/src/pkg/syscall/syscall_netbsd.go b/src/pkg/syscall/syscall_netbsd.go
index 3f6d16f569..d36aa0c528 100644
--- a/src/pkg/syscall/syscall_netbsd.go
+++ b/src/pkg/syscall/syscall_netbsd.go
@@ -22,7 +22,7 @@ type SockaddrDatalink struct {
 	Nlen   uint8
 	Alen   uint8
 	Slen   uint8
-	Data   [24]int8
+	Data   [12]int8
 	raw    RawSockaddrDatalink
 }