diff --git a/includes/wcwuunder-create.php b/includes/wcwuunder-create.php
index aeb889c..a52d169 100644
--- a/includes/wcwuunder-create.php
+++ b/includes/wcwuunder-create.php
@@ -207,7 +207,7 @@ private function wcwp_roundButNull($val)
                 return null;
             }
 
-            return round($val);
+            return round(floatval($val));
         }
 
         /**