diff --git a/src/d2m/converters/message-to-event.js b/src/d2m/converters/message-to-event.js
index 33d8696..6e9ce7b 100644
--- a/src/d2m/converters/message-to-event.js
+++ b/src/d2m/converters/message-to-event.js
@@ -669,7 +669,7 @@ async function messageToEvent(message, guild, options = {}, di) {
 					const match = repliedToEventSenderMxid.match(/^@([^:]*)/)
 					assert(match)
 					repliedToDisplayName = referenced.author.username || match[1] || "a Matrix user" // grab the localpart as the display name, whatever
-					repliedToUserHtml = `<a href="https://matrix.to/#/${repliedToEventSenderMxid}">${repliedToDisplayName}</a>`
+					repliedToUserHtml = tag`<a href="https://matrix.to/#/${repliedToEventSenderMxid}">${repliedToDisplayName}</a>`
 				} else {
 					repliedToDisplayName = referenced.author.global_name || referenced.author.username || "a Discord user"
 					repliedToUserHtml = repliedToDisplayName
@@ -694,6 +694,12 @@ async function messageToEvent(message, guild, options = {}, di) {
 						+ html
 					body = `${repliedToDisplayName}: ${repliedToBody}`.split("\n").map(line => "> " + line).join("\n") // scenario 1 part B for mentions
 						+ "\n\n" + body
+				} else if (referenced.type === DiscordTypes.MessageType.UserJoin) {
+					// Discord user join messages are bridged as joins, not text events. Generate substitute text for reply.
+					const joinerMxid = select("sim", "mxid", {user_id: referenced.author.id}).pluck().get()
+					const joinerHtml = joinerMxid ? tag`<a href="https://matrix.to/#/${joinerMxid}">${repliedToDisplayName}</a>` : tag`<strong>${repliedToDisplayName}</strong>`
+					html = `<blockquote>${joinerHtml} joined the room</blockquote>` + html
+					body = `> ${repliedToDisplayName} joined the room\n\n` + body
 				} else { // repliedToUnknownEvent
 					const dateDisplay = dUtils.howOldUnbridgedMessage(referenced.timestamp, message.timestamp)
 					html = `<blockquote>In reply to ${dateDisplay} from ${repliedToDisplayName}:`
diff --git a/src/d2m/converters/message-to-event.test.js b/src/d2m/converters/message-to-event.test.js
index 97fc25d..b7f0867 100644
--- a/src/d2m/converters/message-to-event.test.js
+++ b/src/d2m/converters/message-to-event.test.js
@@ -4,6 +4,7 @@ const {MatrixServerError} = require("../../matrix/mreq")
 const data = require("../../../test/data")
 const {mockGetEffectivePower} = require("../../matrix/utils.test")
 const Ty = require("../../types")
+const {db} = require("../../passthrough")
 
 /**
  * @param {string} roomID
@@ -733,6 +734,31 @@ test("message2event: reply to a Discord message that wasn't bridged", async t =>
 	}])
 })
 
+test("message2event: reply to a Discord member join (who didn't join on Matrix)", async t => {
+	const events = await messageToEvent(data.message.reply_to_member_join, data.guild.general)
+	t.deepEqual(events, [{
+		$type: "m.room.message",
+		msgtype: "m.text",
+		body: "> PEASANT!! joined the room\n\nwhen the broke friend who we pay to bring food shows up at the medieval lord party",
+		format: "org.matrix.custom.html",
+		formatted_body: "<blockquote><strong>PEASANT!!</strong> joined the room</blockquote>when the broke friend who we pay to bring food shows up at the medieval lord party",
+		"m.mentions": {}
+	}])
+})
+
+test("message2event: reply to a Discord member join (who did join on Matrix)", async t => {
+	db.prepare("INSERT INTO sim (user_id, username, sim_name, mxid) VALUES ('1461677775554478161', 'peasant321_76775', 'peasant321_76775', '@_ooye_peasant321_76775:cadence.moe')").run()
+	const events = await messageToEvent(data.message.reply_to_member_join, data.guild.general)
+	t.deepEqual(events, [{
+		$type: "m.room.message",
+		msgtype: "m.text",
+		body: "> PEASANT!! joined the room\n\nwhen the broke friend who we pay to bring food shows up at the medieval lord party",
+		format: "org.matrix.custom.html",
+		formatted_body: `<blockquote><a href="https://matrix.to/#/@_ooye_peasant321_76775:cadence.moe">PEASANT!!</a> joined the room</blockquote>when the broke friend who we pay to bring food shows up at the medieval lord party`,
+		"m.mentions": {}
+	}])
+})
+
 test("message2event: simple written @mention for matrix user", async t => {
 	const events = await messageToEvent(data.message.simple_written_at_mention_for_matrix, data.guild.general, {}, {
 		api: {
diff --git a/test/data.js b/test/data.js
index cc054cf..f3092bc 100644
--- a/test/data.js
+++ b/test/data.js
@@ -2035,6 +2035,80 @@ module.exports = {
 				tts: false
 			}
 		},
+		reply_to_member_join: {
+			type: 19,
+			content: "when the broke friend who we pay to bring food shows up at the medieval lord party",
+			mentions: [],
+			mention_roles: [],
+			attachments: [],
+			embeds: [],
+			timestamp: "2026-03-30T12:11:04.443000+00:00",
+			edited_timestamp: null,
+			flags: 0,
+			components: [],
+			id: "1488148556962332692",
+			channel_id: "475599038536744962",
+			author: {
+				id: "576945009408999426",
+				username: "randomllama121",
+				avatar: "08510a70f957106dad1580323c40cd7a",
+				discriminator: "0",
+				public_flags: 128,
+				flags: 128,
+				banner: null,
+				accent_color: null,
+				global_name: "random :3",
+				avatar_decoration_data: null,
+				collectibles: null,
+				display_name_styles: null,
+				banner_color: null,
+				clan: null,
+				primary_guild: null
+			},
+			pinned: false,
+			mention_everyone: false,
+			tts: false,
+			message_reference: {
+				type: 0,
+				channel_id: "475599038536744962",
+				message_id: "1488146734352826478",
+				guild_id: "475599038536744960"
+			},
+			referenced_message: {
+				type: 7,
+				content: "",
+				mentions: [],
+				mention_roles: [],
+				attachments: [],
+				embeds: [],
+				timestamp: "2026-03-30T12:03:49.899000+00:00",
+				edited_timestamp: null,
+				flags: 0,
+				components: [],
+				id: "1488146734352826478",
+				channel_id: "475599038536744962",
+				author: {
+					id: "1461677775554478161",
+					username: "peasant321_76775",
+					avatar: null,
+					discriminator: "0",
+					public_flags: 0,
+					flags: 0,
+					banner: null,
+					accent_color: null,
+					global_name: "PEASANT!!",
+					avatar_decoration_data: null,
+					collectibles: null,
+					display_name_styles: null,
+					banner_color: null,
+					clan: null,
+					primary_guild: null
+				},
+				pinned: false,
+				mention_everyone: false,
+				tts: false
+			}
+		},
 		attachment_no_content: {
 			id: "1124628646670389348",
 			type: 0,