diff --git a/code/PercentageField.php b/code/PercentageField.php
index 72df597..afddcd3 100644
--- a/code/PercentageField.php
+++ b/code/PercentageField.php
@@ -16,7 +16,7 @@ public function Type() {
 		return 'percentage numeric text';
 	}
 
-	public function setValue($val) {
+	public function setValue($val, $data = array()) {
 		if (strpos($val, '%') !== false || (double)$val > 1 || (double)$val < -1) {
 			$val = (double)$val / 100.0;
 		}
@@ -31,4 +31,4 @@ public function dataValue() {
 	public function Value() {
 		return ($this->dataValue() * 100.0) . '%';
 	}
-}
\ No newline at end of file
+}