Fix missing parens in hash dereference

diff --git a/Sip/MsgType.pm b/Sip/MsgType.pm
index 8fd2f53..2fe926e 100644 (file)
--- a/Sip/MsgType.pm
+++ b/Sip/MsgType.pm
@@ -1038,7 +1038,7 @@ sub handle_end_patron_session {
 
     ($trans_date) = @{$self->{fixed_fields}};
 
-    $ils->check_inst_id($fields->{FID_INST_ID}, "handle_end_patron_session");
+    $ils->check_inst_id($fields->{(FID_INST_ID)}, "handle_end_patron_session");
 
     ($status, $screen_msg, $print_line) = $ils->end_patron_session($fields->{(FID_PATRON_ID)});