diff --git a/bin/doctor_karma.pl b/bin/doctor_karma.pl
index ea4b6fc..c5ba9d4 100755
--- a/bin/doctor_karma.pl
+++ b/bin/doctor_karma.pl
@@ -62,11 +62,11 @@ sub process_message_with_text {
     my $log_username = defined $username ? "\@$username" : '';
     $logger->log_info(
         "'$message->{text}' received from $first_name:$log_username:$user_id");
-    if ( $text eq '+1' && defined $reply_to_message ) {
+    if ( defined $reply_to_message && $text eq '+1' ) {
         add_karma_to_replied_message_user($message);
         return;
     }
-    if ( $text eq '-1' && defined $reply_to_message ) {
+    if ( defined $reply_to_message && $text eq '-1' ) {
         substract_karma_to_replied_message_user($message);
         return;
     }
@@ -82,7 +82,7 @@ sub process_message_with_text {
         show_top_ten_hate($message);
         return;
     }
-    if ( $text =~ /^(?:-|\+)\d+$/ ) {
+    if ( defined $reply_to_message && $text =~ /^(?:-|\+)\d+$/ ) {
         error_too_much_karma($message);
         return;
     }