diff --git a/lam/lib/html.inc b/lam/lib/html.inc
index b4c3e72e..38149d49 100644
--- a/lam/lib/html.inc
+++ b/lam/lib/html.inc
@@ -2110,7 +2110,7 @@ class htmlInputCheckbox extends htmlElement {
 	 * Returns the CSS selector to use to find show/hide elements.
 	 */
 	protected function getShowHideSelector() {
-		return '.tr';
+		return 'tr';
 	}
 
 }