diff --git a/app/TransactionRules/Actions/ConvertToTransfer.php b/app/TransactionRules/Actions/ConvertToTransfer.php
index 4d9f3063a4..c0e30816bc 100644
--- a/app/TransactionRules/Actions/ConvertToTransfer.php
+++ b/app/TransactionRules/Actions/ConvertToTransfer.php
@@ -127,7 +127,7 @@ class ConvertToTransfer implements ActionInterface
 
         DB::table('transaction_journals')
           ->where('id', '=', $journal['transaction_journal_id'])
-          ->update(['transaction_type_id' => $newType->id]);
+          ->update(['transaction_type_id' => $newType->id, 'bill_id' => null]);
 
         Log::debug('Converted withdrawal to transfer.');
 
@@ -167,7 +167,7 @@ class ConvertToTransfer implements ActionInterface
 
         DB::table('transaction_journals')
           ->where('id', '=', $journal['transaction_journal_id'])
-          ->update(['transaction_type_id' => $newType->id]);
+          ->update(['transaction_type_id' => $newType->id, 'bill_id' => null]);
 
         Log::debug('Converted deposit to transfer.');