diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 57e4f612840..2c89bb6598b 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -5809,29 +5809,39 @@ function natural_search($fields, $value, $mode=0, $nofirstand=0)
 				$i3 = 0;
 				foreach($tmpcrits as $tmpcrit)
 				{
-	            	$newres .= (($i2 > 0 || $i3 > 0) ? ' OR ' : '') . $field . " LIKE '";
+					$newres .= (($i2 > 0 || $i3 > 0) ? ' OR ' : '');
+
+					if (preg_match('/\.(id|rowid)$/', $field))	// Special cas for rowid that is sometimes a ref so used as a search field
+					{
+						$newres .= $field . " = " . (is_numeric(trim($tmpcrit))?trim($tmpcrit):'0');
+					}
+					else
+					{
+						$newres .= $field . " LIKE '";
+
+		            	$tmpcrit=trim($tmpcrit);
+		            	$tmpcrit2=$tmpcrit;
+		            	$tmpbefore='%'; $tmpafter='%';
+		            	if (preg_match('/^[\^\$]/', $tmpcrit))
+		            	{
+		            	    $tmpbefore='';
+		            	    $tmpcrit2 = preg_replace('/^[\^\$]/', '', $tmpcrit2);
+		            	}
+						if (preg_match('/[\^\$]$/', $tmpcrit))
+		            	{
+		            	    $tmpafter='';
+		            	    $tmpcrit2 = preg_replace('/[\^\$]$/', '', $tmpcrit2);
+		            	}
+		            	$newres .= $tmpbefore;
+		            	$newres .= $db->escape($tmpcrit2);
+		            	$newres .= $tmpafter;
+		            	$newres .= "'";
+		            	if (empty($tmpcrit2))
+		            	{
+		            	    $newres .= ' OR ' . $field . " IS NULL";
+		            	}
+					}
 
-	            	$tmpcrit=trim($tmpcrit);
-	            	$tmpcrit2=$tmpcrit;
-	            	$tmpbefore='%'; $tmpafter='%';
-	            	if (preg_match('/^[\^\$]/', $tmpcrit))
-	            	{
-	            	    $tmpbefore='';
-	            	    $tmpcrit2 = preg_replace('/^[\^\$]/', '', $tmpcrit2);
-	            	}
-					if (preg_match('/[\^\$]$/', $tmpcrit))
-	            	{
-	            	    $tmpafter='';
-	            	    $tmpcrit2 = preg_replace('/[\^\$]$/', '', $tmpcrit2);
-	            	}
-	            	$newres .= $tmpbefore;
-	            	$newres .= $db->escape($tmpcrit2);
-	            	$newres .= $tmpafter;
-	            	$newres .= "'";
-	            	if (empty($tmpcrit2))
-	            	{
-	            	    $newres .= ' OR ' . $field . " IS NULL";
-	            	}
 	            	$i3++;
 				}
 				$i2++;	// a criteria was added to string