diff --git a/build/database/repo/professor.php b/build/database/repo/professor.php
index bcdec54..4adb6e0 100644
--- a/build/database/repo/professor.php
+++ b/build/database/repo/professor.php
@@ -180,6 +180,7 @@ class professor extends Repo_i {
 		$st = $this->pdo->prepare("SELECT * FROM `Professeur`$cond GROUP BY abreviation ASC");
 
 		/* (3) Bind params and execute statement */
+		if( is_bool($st) ) return [];
 		$success = $st->execute($parm);
 
 		/* (4) Manage error */
@@ -270,6 +271,8 @@ class professor extends Repo_i {
 				Prof.idProfesseur;");
 
 		/* (3) Bind params and execute statement */
+		if( is_bool($st) ) return [];
+
 		$success = $st->execute($parm);
 
 		/* (4) Manage error */