diff --git a/common/test/run-bolt12_decode.c b/common/test/run-bolt12_decode.c
index 4e6ee7658..521b47d4b 100644
--- a/common/test/run-bolt12_decode.c
+++ b/common/test/run-bolt12_decode.c
@@ -208,7 +208,7 @@ int main(int argc, char *argv[])
 					  strtok->end - strtok->start);
 		str = json_escape_unescape(tmpctx, esc);
 		actual = (string_to_data(tmpctx, str, strlen(str),
-					 "lni", &dlen, &fail) != NULL);
+					 "lno", &dlen, &fail) != NULL);
 		assert(actual == valid);
 	}
 	tal_free(tmpctx);