diff --git a/src/flb_parser_logfmt.c b/src/flb_parser_logfmt.c
index bb5a8f2fea6..8f72b22f803 100644
--- a/src/flb_parser_logfmt.c
+++ b/src/flb_parser_logfmt.c
@@ -182,7 +182,7 @@ static int logfmt_parser(struct flb_parser *parser,
                                 msgpack_pack_str(tmp_pck, 0);
                             }
                             else {
-                                msgpack_pack_nil(tmp_pck);
+                                msgpack_pack_true(tmp_pck);
                             }
                         }
                         else {