diff --git a/mobile.netbiblio.php b/mobile.netbiblio.php
index 3d3e5b1..3641a21 100644
--- a/mobile.netbiblio.php
+++ b/mobile.netbiblio.php
@@ -326,6 +326,12 @@ class NetBiblio extends WebService
 
         if (isset($queryArray['queryText']) && strlen($queryArray['queryText']) > 0) {
             $type = isset($queryArray['queryType']) ? $queryArray['queryType'] : null;
+
+            // this is done for compatibility reason with the older iOS and Android apps
+            if($type == 'producer') {
+                $type = 'producerCode';
+            }
+
             $bs->addQuery($queryArray['queryText'], $type);
         }