diff --git a/Keyboard.js b/Keyboard.js
index c125c010c..b3bb9744d 100644
--- a/Keyboard.js
+++ b/Keyboard.js
@@ -29,7 +29,7 @@ function contains(parent, node){
 	if(has("dom-contains")){
 		return parent.contains(node);
 	}else{
-		return parent.compareDocumentPosition(child) & 8 /* DOCUMENT_POSITION_CONTAINS */;
+		return parent.compareDocumentPosition(node) & 8 /* DOCUMENT_POSITION_CONTAINS */;
 	}
 }