diff --git a/kde/gui/ChatBlockDelegate.qml b/kde/gui/ChatBlockDelegate.qml
index 4c47796..5817c61 100644
--- a/kde/gui/ChatBlockDelegate.qml
+++ b/kde/gui/ChatBlockDelegate.qml
@@ -338,9 +338,9 @@ Column {
         var text = textEdit.getText(0, textEdit.length)
         if (cursorPos < 0 || cursorPos > text.length) return null
         
-        // isfilec from acme: alphanumeric + . - + / : @
+        // isfilec from acme: alphanumeric + . - + / : @ _
         function isfilec(ch) {
-            return /[a-zA-Z0-9.\-+\/:@]/.test(ch)
+            return /[a-zA-Z0-9.\-+\/:@_]/.test(ch)
         }
         
         // Find start of word