diff --git a/app/code/core/Mage/Tax/Helper/Data.php b/app/code/core/Mage/Tax/Helper/Data.php
index 720defc1443e8..a8fb03b7f7468 100644
--- a/app/code/core/Mage/Tax/Helper/Data.php
+++ b/app/code/core/Mage/Tax/Helper/Data.php
@@ -639,7 +639,7 @@ public function getPriceTaxSql($priceField, $taxClassField)
                 $$rateVariable = '';
                 foreach ($$rateArray as $classId=>$rate) {
                     if ($rate) {
-                        $$rateVariable .= sprintf("WHEN %d THEN %12.4f ", $classId, $rate/100);
+                        $$rateVariable .= sprintf("WHEN %d THEN %12.4F ", $classId, $rate/100);
                     }
                 }
                 if ($$rateVariable) {