diff --git a/src/main/java/de/neemann/digital/draw/library/ElementLibrary.java b/src/main/java/de/neemann/digital/draw/library/ElementLibrary.java
index 0fd687612..2c1fa6678 100644
--- a/src/main/java/de/neemann/digital/draw/library/ElementLibrary.java
+++ b/src/main/java/de/neemann/digital/draw/library/ElementLibrary.java
@@ -386,6 +386,7 @@ public class ElementLibrary implements Iterable<ElementLibrary.ElementContainer>
      * Removes an element from the library to enforce a reload
      *
      * @param name the elements name
+     * @throws IOException IOException
      */
     public void invalidateElement(File name) throws IOException {
         LibraryNode n = map.get(name.getName());