diff --git a/src/d2m/converters/message-to-event.embeds.test.js b/src/d2m/converters/message-to-event.embeds.test.js
index 08558b4..9c18386 100644
--- a/src/d2m/converters/message-to-event.embeds.test.js
+++ b/src/d2m/converters/message-to-event.embeds.test.js
@@ -33,7 +33,9 @@ test("message2event embeds: reply with just an embed", async t => {
 		$type: "m.room.message",
 		msgtype: "m.notice",
 		"m.mentions": {},
-		body: "| ## ⏺️ dynastic (@dynastic) https://twitter.com/i/user/719631291747078145"
+		body: "> In reply to an unbridged message:"
+      	+ "\n> PokemonGod: https://twitter.com/dynastic/status/1707484191963648161"
+			+ "\n\n| ## ⏺️ dynastic (@dynastic) https://twitter.com/i/user/719631291747078145"
 			+ "\n| \n| does anyone know where to find that one video of the really mysterious yam-like object being held up to a bunch of random objects, like clocks, and they have unexplained impossible reactions to it?"
 			+ "\n| \n| ### Retweets"
 			+ "\n| 119"
@@ -41,7 +43,8 @@ test("message2event embeds: reply with just an embed", async t => {
 			+ "\n| 5581"
 			+ "\n| — Twitter",
 		format: "org.matrix.custom.html",
-		formatted_body: '<blockquote><p><strong><a href="https://twitter.com/i/user/719631291747078145">⏺️ dynastic (@dynastic)</a></strong>'
+		formatted_body: '<blockquote>In reply to an unbridged message from PokemonGod:<br><a href=\"https://twitter.com/dynastic/status/1707484191963648161\">https://twitter.com/dynastic/status/1707484191963648161</a></blockquote>'
+			+ '<blockquote><p><strong><a href="https://twitter.com/i/user/719631291747078145">⏺️ dynastic (@dynastic)</a></strong>'
 			+ '</p><p>does anyone know where to find that one video of the really mysterious yam-like object being held up to a bunch of random objects, like clocks, and they have unexplained impossible reactions to it?'
 			+ '</p><p><strong>Retweets</strong><br>119</p><p><strong>Likes</strong><br>5581</p>— Twitter</blockquote>'
 	}])
diff --git a/src/d2m/converters/message-to-event.js b/src/d2m/converters/message-to-event.js
index b6268dc..ae7ea1e 100644
--- a/src/d2m/converters/message-to-event.js
+++ b/src/d2m/converters/message-to-event.js
@@ -262,7 +262,9 @@ async function messageToEvent(message, guild, options = {}, di) {
 				- So make sure we don't do anything in this case.
 	*/
 	const mentions = {}
+	/** @type {{event_id: string, room_id: string, source: number}?} */
 	let repliedToEventRow = null
+	let repliedToUnknownEvent = false
 	let repliedToEventSenderMxid = null
 
 	if (message.mention_everyone) mentions.room = true
@@ -278,6 +280,8 @@ async function messageToEvent(message, guild, options = {}, di) {
 		const row = from("event_message").join("message_channel", "message_id").join("channel_room", "channel_id").select("event_id", "room_id", "source").and("WHERE message_id = ? AND part = 0").get(message.message_reference.message_id)
 		if (row) {
 			repliedToEventRow = row
+		} else if (message.referenced_message) {
+			repliedToUnknownEvent = true
 		}
 	} else if (dUtils.isWebhookMessage(message) && message.embeds[0]?.author?.name?.endsWith("↩️")) {
 		// It could be a PluralKit emulated reply, let's see if it has a message link
@@ -451,7 +455,7 @@ async function messageToEvent(message, guild, options = {}, di) {
 
 		// Fallback body/formatted_body for replies
 		// This branch is optional - do NOT change anything apart from the reply fallback, since it may not be run
-		if (repliedToEventRow && options.includeReplyFallback !== false) {
+		if ((repliedToEventRow || repliedToUnknownEvent) && options.includeReplyFallback !== false) {
 			let repliedToDisplayName
 			let repliedToUserHtml
 			if (repliedToEventRow?.source === 0 && repliedToEventSenderMxid) {
@@ -481,12 +485,33 @@ async function messageToEvent(message, guild, options = {}, di) {
 				discordOnly: true,
 				escapeHTML: false,
 			})
-			html = `<mx-reply><blockquote><a href="https://matrix.to/#/${repliedToEventRow.room_id}/${repliedToEventRow.event_id}">In reply to</a> ${repliedToUserHtml}`
-				+ `<br>${repliedToHtml}</blockquote></mx-reply>`
-				+ html
-			body = (`${repliedToDisplayName}: ` // scenario 1 part B for mentions
-				+ repliedToBody).split("\n").map(line => "> " + line).join("\n")
-				+ "\n\n" + body
+			if (repliedToEventRow) {
+				// Generate a reply pointing to the Matrix event we found
+				html = `<mx-reply><blockquote><a href="https://matrix.to/#/${repliedToEventRow.room_id}/${repliedToEventRow.event_id}">In reply to</a> ${repliedToUserHtml}`
+					+ `<br>${repliedToHtml}</blockquote></mx-reply>`
+					+ html
+				body = (`${repliedToDisplayName}: ` // scenario 1 part B for mentions
+					+ repliedToBody).split("\n").map(line => "> " + line).join("\n")
+					+ "\n\n" + body
+			} else { // repliedToUnknownEvent
+				// This reply can't point to the Matrix event because it isn't bridged, we need to indicate this.
+				assert(message.referenced_message)
+				const dateDifference = new Date(message.timestamp).getTime() - new Date(message.referenced_message.timestamp).getTime()
+				const oneHour = 60 * 60 * 1000
+				if (dateDifference < oneHour) {
+					var dateDisplay = "n"
+				} else if (dateDifference < 25 * oneHour) {
+					var dateDisplay = ` ${Math.floor(dateDifference / oneHour)}-hour-old`
+				} else {
+					var dateDisplay = ` ${Math.round(dateDifference / (24 * oneHour))}-day-old`
+				}
+				html = `<blockquote>In reply to a${dateDisplay} unbridged message from ${repliedToDisplayName}:`
+					+ `<br>${repliedToHtml}</blockquote>`
+					+ html
+				body = (`In reply to a${dateDisplay} unbridged message:\n${repliedToDisplayName}: `
+					+ repliedToBody).split("\n").map(line => "> " + line).join("\n")
+					+ "\n\n" + body
+			}
 		}
 
 		const newTextMessageEvent = {
diff --git a/src/d2m/converters/message-to-event.test.js b/src/d2m/converters/message-to-event.test.js
index 78848b8..3e7bcd4 100644
--- a/src/d2m/converters/message-to-event.test.js
+++ b/src/d2m/converters/message-to-event.test.js
@@ -724,6 +724,20 @@ test("message2event: infinidoge's reply to ami's matrix smalltext singleline rep
 	}])
 })
 
+test("message2event: reply to a Discord message that wasn't bridged", async t => {
+	const events = await messageToEvent(data.message.reply_to_unknown_message, data.guild.general)
+	t.deepEqual(events, [{
+		$type: "m.room.message",
+		msgtype: "m.text",
+      body: `> In reply to a 1-day-old unbridged message:`
+			+ `\n> Occimyy: BILLY BOB THE GREAT`
+			+ `\n\nenigmatic`,
+      format: "org.matrix.custom.html",
+      formatted_body: `<blockquote>In reply to a 1-day-old unbridged message from Occimyy:<br>BILLY BOB THE GREAT</blockquote>enigmatic`,
+		"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/src/d2m/discord-packets.js b/src/d2m/discord-packets.js
index b9aba41..a0f2be9 100644
--- a/src/d2m/discord-packets.js
+++ b/src/d2m/discord-packets.js
@@ -171,6 +171,7 @@ const utils = {
 					await eventDispatcher.onThreadCreate(client, message.d)
 
 				} else if (message.t === "THREAD_UPDATE") {
+					// @ts-ignore
 					await eventDispatcher.onChannelOrThreadUpdate(client, message.d, true)
 
 				} else if (message.t === "MESSAGE_CREATE") {
diff --git a/test/data.js b/test/data.js
index b815b08..1c44af5 100644
--- a/test/data.js
+++ b/test/data.js
@@ -1146,6 +1146,93 @@ module.exports = {
 				components: []
 			}
 		},
+		reply_to_unknown_message: {
+			type: 19,
+			content: "enigmatic",
+			mentions: [
+				{
+					id: "1060361805152669766",
+					username: "occimyy",
+					avatar: "009d2bf557bca7d4f5a1d5b75a4e2eea",
+					discriminator: "0",
+					public_flags: 0,
+					flags: 0,
+					banner: null,
+					accent_color: null,
+					global_name: "Lily",
+					avatar_decoration_data: null,
+					banner_color: null,
+					clan: null,
+					primary_guild: null
+				}
+			],
+			mention_roles: [],
+			attachments: [],
+			embeds: [],
+			timestamp: "2025-02-22T23:34:14.036000+00:00",
+			edited_timestamp: null,
+			flags: 0,
+			components: [],
+			id: "1343002945670746173",
+			channel_id: "392141322863116319",
+			author: {
+				id: "114147806469554185",
+				username: "extremity",
+				avatar: "0c73816563bf912ccebf1a0f1546cfe4",
+				discriminator: "0",
+				public_flags: 768,
+				flags: 768,
+				banner: null,
+				accent_color: null,
+				global_name: null,
+				avatar_decoration_data: null,
+				banner_color: null,
+				clan: null,
+				primary_guild: null
+			},
+			pinned: false,
+			mention_everyone: false,
+			tts: false,
+			message_reference: {
+				type: 0,
+				channel_id: "392141322863116319",
+				message_id: "1342606571380674560",
+				guild_id: "112760669178241024"
+			},
+			position: 0,
+			referenced_message: {
+				type: 0,
+				content: "BILLY BOB THE GREAT",
+				mentions: [],
+				mention_roles: [],
+				attachments: [],
+				embeds: [],
+				timestamp: "2025-02-21T21:19:11.041000+00:00",
+				edited_timestamp: null,
+				flags: 0,
+				components: [],
+				id: "1342606571380674560",
+				channel_id: "392141322863116319",
+				author: {
+					id: "1060361805152669766",
+					username: "occimyy",
+					avatar: "009d2bf557bca7d4f5a1d5b75a4e2eea",
+					discriminator: "0",
+					public_flags: 0,
+					flags: 0,
+					banner: null,
+					accent_color: null,
+					global_name: "Occimyy",
+					avatar_decoration_data: null,
+					banner_color: null,
+					clan: null,
+					primary_guild: null
+				},
+				pinned: false,
+				mention_everyone: false,
+				tts: false
+			}
+		},
 		attachment_no_content: {
 			id: "1124628646670389348",
 			type: 0,