1 files changed, 1 insertions, 1 deletions
diff --git a/LedgerSMB/GL.pm b/LedgerSMB/GL.pm
index a17580f0..dab7b0a1 100755
--- a/LedgerSMB/GL.pm
+++ b/LedgerSMB/GL.pm
@@ -164,7 +164,7 @@ sub post_transaction {
 
 			($null, $project_id) = split /--/, 
 				$form->{"projectnumber_$i"};
-			$project_id ||= 'NULL';
+			$project_id ||= undef;
 
 
 			$query = qq|