diff --git a/core/model/fieldtypes/Decimal.php b/core/model/fieldtypes/Decimal.php
index 140dd5bcb..5b4b1630e 100644
--- a/core/model/fieldtypes/Decimal.php
+++ b/core/model/fieldtypes/Decimal.php
@@ -31,7 +31,7 @@ class Decimal extends DBField {
 	function saveInto($dataObject) {
 		$fieldName = $this->name;
 		if($fieldName) {
-			$dataObject->$fieldName = (float)preg_replace('/[^0-9.]/', '', $this->value);
+			$dataObject->$fieldName = (float)preg_replace('/[^0-9.\-\+]/', '', $this->value);
 		} else {
 			user_error("DBField::saveInto() Called on a nameless '" . get_class($this) . "' object", E_USER_ERROR);
 		}