diff --git a/include/common/riga.php b/include/common/riga.php
index 3a21f0f1d..a1c9880f8 100755
--- a/include/common/riga.php
+++ b/include/common/riga.php
@@ -33,7 +33,7 @@ echo '
// Quantità
echo '
- {[ "type": "number", "label": "'.tr('Q.tà').'", "name": "qta", "required": 1, "value": "'.$result['qta'].'", "decimals": "qta"'.(isset($result['max_qta']) ? ', "icon-after": "/ '.numberFormat($result['max_qta'], 'qta').' "' : '').', "min-value": "'.$result['qta_evasa'].'" ]}
+ {[ "type": "number", "label": "'.tr('Q.tà').'", "name": "qta", "required": 1, "value": "'.abs($result['qta']).'", "decimals": "qta"'.(isset($result['max_qta']) ? ', "icon-after": "/ '.numberFormat(abs($result['max_qta']), 'qta').' "' : '').', "min-value": "'.abs($result['qta_evasa']).'" ]}
';
// Unità di misura