diff --git a/servers/php/getrouteformap.php b/servers/php/getrouteformap.php
index c593a2d..93a69e4 100644
--- a/servers/php/getrouteformap.php
+++ b/servers/php/getrouteformap.php
@@ -20,7 +20,7 @@
                 }
                 $result->close();
             }
-        } while ($mysqli->next_result());
+        } while ($mysqli->more_results() && $mysqli->next_result());
     }
     else {
         die('error: '  . $mysqli->error);
@@ -33,4 +33,4 @@
     echo $json;
 
     $mysqli->close();
-?>
\ No newline at end of file
+?>