diff --git a/lib/Reddit.pm b/lib/Reddit.pm
index 1f988d6..d16944d 100644
--- a/lib/Reddit.pm
+++ b/lib/Reddit.pm
@@ -163,8 +163,8 @@ sub _parse_link {
 }
 
 sub _parse_comment_id {
-# ID's require a t3_ or t1_ prefix depending on whether it is a
-# post or comment id respectively.
+    # ID's require a t3_ or t1_ prefix depending on whether it is a
+    # post or comment id respectively.
 	my $id = shift;
 	if (length($id) == 5){ $id = "t3_" . $id}
 	elsif (length($id) == 7){ $id = "t1_" . $id}
@@ -229,7 +229,7 @@ sub submit_story {
 sub comment {
     my $self = shift;
     my ($thing_id, $comment) = @_;
-    $thing_id = &_parse_comment_id($thing_id);
+    $thing_id = $self->_parse_comment_id($thing_id);
     my $response = $self->post($self->comment_api,
         {
             thing_id    => $thing_id,