diff --git a/qrcode/index.php b/qrcode/index.php
index edef321..6eb8455 100644
--- a/qrcode/index.php
+++ b/qrcode/index.php
@@ -25,12 +25,12 @@ $numQrcode_static = $db->getValue ("static_qrcodes", "count(*)");
 $total = $numQrcode_dynamic + $numQrcode_static;
 
 //Get Total scan
-$numScan = $db->query("SELECT sum(scan) FROM dynamic_qrcodes");
+$numScan = $db->query("SELECT sum(scan) FROM ".DATABASE_PREFIX."dynamic_qrcodes");
 
                                                 /* CREATED CHART *///I initialize the variables that will contain the daily values to 0 otherwise in the foreach loop they will be reset every time
 
 //Get the number of DYNAMIC qr code created in 7 days and total scan
-$createdQrcode_dynamic = $db->query("select `created_at`, `scan` from dynamic_qrcodes where `created_at` > curdate()-7;");
+$createdQrcode_dynamic = $db->query("select `created_at`, `scan` from ".DATABASE_PREFIX."dynamic_qrcodes where `created_at` > curdate()-7;");
 
 $dynamic_today = $dynamic_oneday = $dynamic_twoday = $dynamic_threeday = $dynamic_fourday = $dynamic_fiveday = $dynamic_sixday  = 0;
 $scan_today = $scan_oneday = $scan_twoday = $scan_threeday = $scan_fourday = $scan_fiveday = $scan_sixday = 0;
@@ -49,7 +49,7 @@ foreach ($createdQrcode_dynamic as $row) {
 
                                                 /* SCAN CHART */
 //Get the number of STATIC qr code created in 7 days
-$createdQrcode_static = $db->query("select `created_at` from static_qrcodes where `created_at` > curdate()-7;");
+$createdQrcode_static = $db->query("select `created_at` from ".DATABASE_PREFIX."static_qrcodes where `created_at` > curdate()-7;");
 
 $static_today = $static_oneday = $static_twoday = $static_threeday = $static_fourday = $static_fiveday = $static_sixday = 0;
 foreach ($createdQrcode_static as $row) {
diff --git a/qrcode/lib/Dynamic_Qrcode/Dynamic_Qrcode.php b/qrcode/lib/Dynamic_Qrcode/Dynamic_Qrcode.php
index 3c4f3cb..6b45630 100644
--- a/qrcode/lib/Dynamic_Qrcode/Dynamic_Qrcode.php
+++ b/qrcode/lib/Dynamic_Qrcode/Dynamic_Qrcode.php
@@ -149,7 +149,7 @@ class Dynamic_Qrcode
         $dynamic_id = htmlspecialchars($_GET['dynamic_id'], ENT_QUOTES, 'UTF-8');           // get dynamic id
         $old_filename = htmlspecialchars($_GET['filename'], ENT_QUOTES, 'UTF-8');           // get filename
         
-        $query = $db->query("SELECT format FROM dynamic_qrcodes WHERE id=$dynamic_id");     // get format
+        $query = $db->query("SELECT format FROM ".DATABASE_PREFIX."dynamic_qrcodes WHERE id=$dynamic_id");     // get format
         $format = $query[0]['format'];
         
         $data_to_db = $this->collect();
@@ -190,7 +190,7 @@ class Dynamic_Qrcode
         
         $db = getDbInstance();
         
-        $query = $db->query("SELECT format FROM dynamic_qrcodes WHERE id=$dynamic_id");     
+        $query = $db->query("SELECT format FROM ".DATABASE_PREFIX."dynamic_qrcodes WHERE id=$dynamic_id");     
         $format = $query[0]['format'];
         
         $db->where('id', $dynamic_id);
diff --git a/qrcode/lib/Static_Qrcode/Static_Qrcode.php b/qrcode/lib/Static_Qrcode/Static_Qrcode.php
index c87bf46..6cf1f60 100644
--- a/qrcode/lib/Static_Qrcode/Static_Qrcode.php
+++ b/qrcode/lib/Static_Qrcode/Static_Qrcode.php
@@ -445,7 +445,7 @@ class Static_Qrcode
         $static_id = htmlspecialchars($_GET['static_id'], ENT_QUOTES, 'UTF-8');
         $old_filename = htmlspecialchars($_GET['filename'], ENT_QUOTES, 'UTF-8');
         
-        $query = $db->query("SELECT format FROM static_qrcodes WHERE id=$static_id");     // get format
+        $query = $db->query("SELECT format FROM ".DATABASE_PREFIX."static_qrcodes WHERE id=$static_id");     // get format
         $format = $query[0]['format'];
         
         $data_to_db = $this->collect();
@@ -487,7 +487,7 @@ class Static_Qrcode
         
         $db = getDbInstance();
         
-        $query = $db->query("SELECT format FROM static_qrcodes WHERE id=$static_id");     // get format
+        $query = $db->query("SELECT format FROM ".DATABASE_PREFIX."static_qrcodes WHERE id=$static_id");     // get format
         $format = $query[0]['format'];
         
         $db->where('id', $static_id);