diff --git a/CHANGELOG.md b/CHANGELOG.md
index ae1bd97eac82..7c1eaa959848 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -30,6 +30,11 @@
 ### Server
 - Fix: nodeinfoにenableMcaptchaとenableTurnstileが無いのを修正
 
+## 202x.x.x (unreleased)
+
+### Client
+- Fix: MFMのオートコンプリートが出るべき状況で出ないことがある問題を修正
+
 ## 2024.2.0
 
 ### Note
diff --git a/packages/frontend/src/scripts/autocomplete.ts b/packages/frontend/src/scripts/autocomplete.ts
index fe515d81a1c4..9fc8f7843ed5 100644
--- a/packages/frontend/src/scripts/autocomplete.ts
+++ b/packages/frontend/src/scripts/autocomplete.ts
@@ -93,9 +93,11 @@ export class Autocomplete {
 			return;
 		}
 
+		const afterLastMfmParam = text.split(/\$\[[a-zA-Z]+/).pop();
+
 		const isMention = mentionIndex !== -1;
 		const isHashtag = hashtagIndex !== -1;
-		const isMfmParam = mfmParamIndex !== -1 && text.split(/\$\[[a-zA-Z]+/).pop()?.includes('.');
+		const isMfmParam = mfmParamIndex !== -1 && afterLastMfmParam?.includes('.') && !afterLastMfmParam?.includes(' ');
 		const isMfmTag = mfmTagIndex !== -1 && !isMfmParam;
 		const isEmoji = emojiIndex !== -1 && text.split(/:[a-z0-9_+\-]+:/).pop()!.includes(':');