diff --git a/lpod/document.py b/lpod/document.py
index 18e54f9..831d0a2 100644
--- a/lpod/document.py
+++ b/lpod/document.py
@@ -603,7 +603,8 @@ def insert_style(self, style, name=None, automatic=False, default=False):
         # Insert it!
         if existing is not None:
             container.delete(existing)
-        container.append(style)
+        if container:
+            container.append(style)
         return style.get_name()