diff --git a/htdocs/imports/import.php b/htdocs/imports/import.php
index c6e2e282778..8cd1b826ab0 100644
--- a/htdocs/imports/import.php
+++ b/htdocs/imports/import.php
@@ -1545,6 +1545,14 @@ if ($step == 5 && $datatoimport)
     }
     else
     {
+    	$max_execution_time_for_importexport = (empty($conf->global->IMPORT_MAX_EXECUTION_TIME) ? 300 : $conf->global->IMPORT_MAX_EXECUTION_TIME); // 5mn if not defined
+    	$max_time = @ini_get("max_execution_time");
+    	if ($max_time && $max_time < $max_execution_time_for_importexport)
+    	{
+    		dol_syslog("max_execution_time=".$max_time." is lower than max_execution_time_for_importexport=".$max_execution_time_for_importexport.". We try to increase it dynamically.");
+    		@ini_set("max_execution_time", $max_execution_time_for_importexport); // This work only if safe mode is off. also web servers has timeout of 300
+    	}
+
         // Launch import
         $arrayoferrors = array();
         $arrayofwarnings = array();