diff --git a/src/main/java/eu/siacs/conversations/utils/XmlHelper.java b/src/main/java/eu/siacs/conversations/utils/XmlHelper.java
index 4dee07cf777c8b98dc81162b36ff7e489c3d9858..198ce28b949295a1b3eca9246763986dae2ced0b 100644
--- a/src/main/java/eu/siacs/conversations/utils/XmlHelper.java
+++ b/src/main/java/eu/siacs/conversations/utils/XmlHelper.java
@@ -7,6 +7,7 @@ public class XmlHelper {
 		content = content.replace(">", ">");
 		content = content.replace("\"", """);
 		content = content.replace("'", "'");
+		content = content.replaceAll("\\p{Cc}", "");
 		return content;
 	}
 }