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-rw-r--r--program/js/app.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/program/js/app.js b/program/js/app.js
index c0da94348..254514558 100644
--- a/program/js/app.js
+++ b/program/js/app.js
@@ -5738,7 +5738,7 @@ function rcube_webmail()
this.plain2html = function(plainText, id)
{
var lock = this.set_busy(true, 'converting');
- $(document.getElementById(id)).val('<pre>'+plainText+'</pre>');
+ $(document.getElementById(id)).val(plainText ? '<pre>'+plainText+'</pre>' : '');
this.set_busy(false, null, lock);
};