diff --git a/members/printfeercpt.pl b/members/printfeercpt.pl
index c24000227c..6c695e469a 100755
--- a/members/printfeercpt.pl
+++ b/members/printfeercpt.pl
@@ -57,7 +57,7 @@ output_and_exit_if_error(
 
 my $letter = C4::Letters::GetPreparedLetter(
     module                 => 'circulation',
-    letter_code            => $credit->credit_type_code,
+    letter_code            => 'CREDIT_' . $credit->credit_type_code,
     branchcode             => C4::Context::mybranch,
     message_transport_type => 'print',
     lang                   => $patron->lang,
diff --git a/members/printinvoice.pl b/members/printinvoice.pl
index 54b3e1e06e..7d591c44d2 100755
--- a/members/printinvoice.pl
+++ b/members/printinvoice.pl
@@ -57,7 +57,7 @@ output_and_exit_if_error(
 
 my $letter = C4::Letters::GetPreparedLetter(
     module                 => 'circulation',
-    letter_code            => $debit->debit_type_code,
+    letter_code            => 'DEBIT_' . $debit->debit_type_code,
     branchcode             => C4::Context::mybranch,
     message_transport_type => 'print',
     lang                   => $patron->lang,