diff --git a/htdocs/lib/mysql.lib.php b/htdocs/lib/mysql.lib.php
index 36add016016..1d4675e0222 100644
--- a/htdocs/lib/mysql.lib.php
+++ b/htdocs/lib/mysql.lib.php
@@ -346,7 +346,7 @@ class DoliDb
 
     function rollback()
     {
-        if ($this->transaction_opened)
+        if ($this->transaction_opened==1)
         {
             $ret=$this->query("ROLLBACK");
             $this->transaction_opened=0;
diff --git a/htdocs/lib/pgsql.lib.php b/htdocs/lib/pgsql.lib.php
index fe4899db1c0..b206a533088 100644
--- a/htdocs/lib/pgsql.lib.php
+++ b/htdocs/lib/pgsql.lib.php
@@ -326,7 +326,7 @@ class DoliDb
     */
     function rollback()
     {
-        if ($this->transaction_opened)
+        if ($this->transaction_opened==1)
         {
             $ret=$this->query("ROLLBACK;");
             $this->transaction_opened=0;