diff --git a/res/css/views/rooms/_MessageComposer.scss b/res/css/views/rooms/_MessageComposer.scss
index 5c34f78a8be..41faff2b038 100644
--- a/res/css/views/rooms/_MessageComposer.scss
+++ b/res/css/views/rooms/_MessageComposer.scss
@@ -37,6 +37,7 @@ limitations under the License.
     }
 
     .mx_MessageComposer_row {
+        min-width: 0;
         grid-area: composer;
     }