diff --git a/src/web/app/mobile/tags/post-form.tag b/src/web/app/mobile/tags/post-form.tag
index 436a364b94..9bce226bfd 100644
--- a/src/web/app/mobile/tags/post-form.tag
+++ b/src/web/app/mobile/tags/post-form.tag
@@ -266,7 +266,7 @@
 				: undefined;
 
 			this.api('posts/create', {
-				text: this.refs.text.value,
+				text: this.refs.text.value == '' ? undefined : this.refs.text.value,
 				media_ids: files,
 				reply_to_id: opts.reply ? opts.reply.id : undefined,
 				poll: this.poll ? this.refs.poll.get() : undefined