diff --git a/app/javascript/flavours/glitch/styles/components/composer.scss b/app/javascript/flavours/glitch/styles/components/composer.scss
index 92a29a933..51287f62e 100644
--- a/app/javascript/flavours/glitch/styles/components/composer.scss
+++ b/app/javascript/flavours/glitch/styles/components/composer.scss
@@ -249,6 +249,7 @@
 .compose-form__autosuggest-wrapper,
 .autosuggest-input {
   position: relative;
+  width: 100%;
 
   label {
     .autosuggest-textarea__textarea {