diff --git a/lib/base/dao/dao.class.php b/lib/base/dao/dao.class.php
index ad118b8f54..2f7ee95be9 100644
--- a/lib/base/dao/dao.class.php
+++ b/lib/base/dao/dao.class.php
@@ -492,11 +492,11 @@ class baseDAO
      * Begin Transaction
      *
      * @access public
-     * @return void
+     * @return bool
      */
-    public function begin()
+    public function begin(): bool
     {
-        if(!$this->dbh->inTransaction()) $this->dbh->beginTransaction();
+        return $this->dbh->beginTransaction();
     }
 
     /**
@@ -506,7 +506,7 @@ class baseDAO
      * @access public
      * @return bool
      */
-    public function inTransaction()
+    public function inTransaction(): bool
     {
         return $this->dbh->inTransaction();
     }
@@ -516,11 +516,11 @@ class baseDAO
      * Roll back
      *
      * @access public
-     * @return void
+     * @return bool
      */
-    public function rollBack()
+    public function rollBack(): bool
     {
-        if($this->dbh->inTransaction()) $this->dbh->rollBack();
+        return $this->dbh->rollBack();
     }
 
     /**
@@ -528,11 +528,11 @@ class baseDAO
      * Commits a transaction.
      *
      * @access public
-     * @return void
+     * @return bool
      */
-    public function commit()
+    public function commit(): bool
     {
-        if($this->dbh->inTransaction()) $this->dbh->commit();
+        return $this->dbh->commit();
     }
 
     /**
diff --git a/lib/dbh/dbh.class.php b/lib/dbh/dbh.class.php
index 89aa19f1b2..c955da0c0b 100644
--- a/lib/dbh/dbh.class.php
+++ b/lib/dbh/dbh.class.php
@@ -1059,7 +1059,7 @@ class dbh
      */
     public function beginTransaction()
     {
-        return $this->pdo->beginTransaction();
+        return $this->pdo->inTransaction() ? false : $this->pdo->beginTransaction();
     }
 
     /**
@@ -1081,7 +1081,7 @@ class dbh
      */
     public function rollBack()
     {
-        return $this->pdo->rollBack();
+        return $this->pdo->inTransaction() ? $this->pdo->rollBack() : false;
     }
 
     /**
@@ -1092,7 +1092,7 @@ class dbh
      */
     public function commit()
     {
-        return $this->pdo->commit();
+        return $this->pdo->inTransaction() ? $this->pdo->commit() : false;
     }
 
     /**