diff --git a/scripts/patch-weboffice-collabora-yaml.py b/scripts/patch-weboffice-collabora-yaml.py
index d509931..52984b2 100644
--- a/scripts/patch-weboffice-collabora-yaml.py
+++ b/scripts/patch-weboffice-collabora-yaml.py
@@ -22,7 +22,7 @@ if "--o:hexify_embedded_urls=true" in extra_str:
 
 lines = extra_str.splitlines()
 
-lines[-1] = lines[-1] += " \\"
+lines[-1] += " \\"
 
 lines.append("--o:hexify_embedded_urls=true")