diff --git a/Component-NoteBlock.md b/Component-NoteBlock.md
index d22f71f..d7a18c2 100644
--- a/Component-NoteBlock.md
+++ b/Component-NoteBlock.md
@@ -1,5 +1,7 @@
 This component represents a vanilla note block.
 
+**Important**: this component is only available if OpenComponents is also installed!
+
 Component name: `note_block`.  
 Callbacks:
 - `getPitch(): number`