diff --git a/htdocs/core/db/mysqli.class.php b/htdocs/core/db/mysqli.class.php
index e36fc547fa0..7d2f075944b 100644
--- a/htdocs/core/db/mysqli.class.php
+++ b/htdocs/core/db/mysqli.class.php
@@ -484,7 +484,7 @@ class DoliDBMysqli extends DoliDB
 	 */
 	public function escapeforlike($stringtoencode)
 	{
-		return str_replace(array('_', '\\', '%'), array('\_', '\\\\', '\%'), (string) $stringtoencode);
+		return str_replace(array('\\', '_', '%'), array('\\\\', '\_', '\%'), (string) $stringtoencode);
 	}
 
 	/**
diff --git a/htdocs/core/db/pgsql.class.php b/htdocs/core/db/pgsql.class.php
index fb18ed0f161..e7e0b0da9d8 100644
--- a/htdocs/core/db/pgsql.class.php
+++ b/htdocs/core/db/pgsql.class.php
@@ -729,7 +729,7 @@ class DoliDBPgsql extends DoliDB
 	 */
 	public function escapeforlike($stringtoencode)
 	{
-		return str_replace(array('_', '\\', '%'), array('\_', '\\\\', '\%'), (string) $stringtoencode);
+		return str_replace(array('\\', '_', '%'), array('\\\\', '\_', '\%'), (string) $stringtoencode);
 	}
 
 	/**
diff --git a/htdocs/core/db/sqlite3.class.php b/htdocs/core/db/sqlite3.class.php
index 40d0f10baa8..819e5ba72f0 100644
--- a/htdocs/core/db/sqlite3.class.php
+++ b/htdocs/core/db/sqlite3.class.php
@@ -657,7 +657,7 @@ class DoliDBSqlite3 extends DoliDB
 	 */
 	public function escapeforlike($stringtoencode)
 	{
-		return str_replace(array('_', '\\', '%'), array('\_', '\\\\', '\%'), (string) $stringtoencode);
+		return str_replace(array('\\', '_', '%'), array('\\\\', '\_', '\%'), (string) $stringtoencode);
 	}
 
 	/**
diff --git a/test/phpunit/CodingSqlTest.php b/test/phpunit/CodingSqlTest.php
index 00c7a5aebae..504203eeabf 100644
--- a/test/phpunit/CodingSqlTest.php
+++ b/test/phpunit/CodingSqlTest.php
@@ -157,6 +157,44 @@ class CodingSqlTest extends PHPUnit\Framework\TestCase
 		print __METHOD__."\n";
 	}
 
+	/**
+	 * testEscape
+	 *
+	 * @return string
+	 */
+	public function testEscape()
+	{
+		global $conf,$user,$langs,$db;
+		$conf=$this->savconf;
+		$user=$this->savuser;
+		$langs=$this->savlangs;
+		$db=$this->savdb;
+
+		$a = 'abc"\'def';
+		print $a;
+		$result = $db->escape($a);	// $result must be abc\"\'def
+		$this->assertEquals('abc\"\\\'def', $result);
+	}
+
+	/**
+	 * testEscapeForLike
+	 *
+	 * @return string
+	 */
+	public function testEscapeForLike()
+	{
+		global $conf,$user,$langs,$db;
+		$conf=$this->savconf;
+		$user=$this->savuser;
+		$langs=$this->savlangs;
+		$db=$this->savdb;
+
+		$a = 'abc"\'def_ghi%klm\\nop';
+		//print $a;
+		$result = $db->escapeforlike($a);	// $result must be abc"'def\_ghi\%klm\\nop
+		$this->assertEquals('abc"\'def\_ghi\%klm\\\\nop', $result);
+	}
+
 	/**
 	 * testSql
 	 *