diff --git a/importexport/inc/class.importexport_import_csv.inc.php b/importexport/inc/class.importexport_import_csv.inc.php
index b536a2946b..56977915a1 100755
--- a/importexport/inc/class.importexport_import_csv.inc.php
+++ b/importexport/inc/class.importexport_import_csv.inc.php
@@ -358,7 +358,7 @@ class importexport_import_csv implements importexport_iface_import_record { //,
 				if ($record[$name]) {
 					// Automatically handle text owner without explicit translation
 					$new_owner = importexport_helper_functions::account_name2id($record[$name]);
-					if(count($new_owner) != count(explode(',',$record[$name])))
+					if(!is_array($new_owner) || count($new_owner) != count(explode(',', $record[$name])))
 					{
 						// Unable to parse value into account
 						$warnings[] = $name . ': ' .lang('%1 is not a known user or group', $record[$name]);