diff --git a/lib/net/net.ww b/lib/net/net.ww
index 3336d8e4..449684ac 100644
--- a/lib/net/net.ww
+++ b/lib/net/net.ww
@@ -20,7 +20,9 @@ def SYS_LISTEN:  i64 = 50;
 
 // sockaddrin is laid out by the kernel: family u16, port u16 (BE),
 // addr u32 (BE), padding 8B = 16B total. Caller fills it.
-type sockaddrin = struct {
+// Exported: connect/bind take *sockaddrin, so a caller must be able to
+// name it (Hare exports sockaddr_in; ref/hare/sys/+linux/socket.ha:11). #102
+export type sockaddrin = struct {
 	family: u16,
 	port:   u16,
 	addr:   u32,