diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index 23dd88d3151..811ad017c4d 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -7384,10 +7384,17 @@ class Form
 
 		$objecttmp = null;
 
+		// Example of value for $objectdec:
+		// Bom:bom/class/bom.class.php:0:t.status=1
+		// Bom:bom/class/bom.class.php:0:t.status=1:ref
+		// Bom:bom/class/bom.class.php:0:(t.status:=:1):ref
 		$InfoFieldList = explode(":", $objectdesc, 4);
 		$vartmp = $InfoFieldList[3];
-		$InfoFieldList[4] = preg_replace('/^.*:(\w*)$/', '\1', $vartmp);	// take the sort field
-		$InfoFieldList[3] = preg_replace('/:\w*$/', '', $vartmp);			// take the filter field
+		$reg = array();
+		if (preg_match('/^.*:(\w*)$/', $vartmp, $reg)) {
+			$InfoFieldList[4] = $reg[1];	// take the sort field
+		}
+		$InfoFieldList[3] = preg_replace('/:\w*$/', '', $vartmp);	// take the filter field
 
 		$classname = $InfoFieldList[0];
 		$classpath = $InfoFieldList[1];