diff --git a/Theme/Backend/invoice-list.tpl.php b/Theme/Backend/invoice-list.tpl.php
index 88fc0b1..837209e 100644
--- a/Theme/Backend/invoice-list.tpl.php
+++ b/Theme/Backend/invoice-list.tpl.php
@@ -37,7 +37,7 @@ echo $this->getData('nav')->render(); ?>
                 <tr>
                     <td colspan="8">
                 <tbody>
-                <?php $count = 0; foreach ([] as $key => $value) : $count++; ?>
+                <?php $count = 0; foreach ([] as $key => $value) : ++$count; ?>
                 <?php endforeach; ?>
                 <?php if ($count === 0) : ?>
                 <tr><td colspan="8" class="empty"><?= $this->getHtml('Empty', 0, 0); ?>
diff --git a/Theme/Backend/purchase-invoice-list.tpl.php b/Theme/Backend/purchase-invoice-list.tpl.php
index 1018831..7aded6a 100644
--- a/Theme/Backend/purchase-invoice-list.tpl.php
+++ b/Theme/Backend/purchase-invoice-list.tpl.php
@@ -37,7 +37,7 @@ echo $this->getData('nav')->render(); ?>
                 <tr>
                     <td colspan="8">
                 <tbody>
-                <?php $count = 0; foreach ([] as $key => $value) : $count++; ?>
+                <?php $count = 0; foreach ([] as $key => $value) : ++$count; ?>
                 <?php endforeach; ?>
                 <?php if ($count === 0) : ?>
                 <tr><td colspan="8" class="empty"><?= $this->getHtml('Empty', 0, 0); ?>