diff --git a/average.c b/average.c
index 0a1c470..d19012f 100644
--- a/average.c
+++ b/average.c
@@ -36,7 +36,7 @@ int main(void) {
 	results[4] = average(numbers, 4);
 	results[5] = average(numbers, 5);
 
-	for(size_t i = 0; i < sizeof(results) / sizeof(MAYBE(intmax_t)); i++) {
+	for (size_t i = 0; i < sizeof(results) / sizeof(MAYBE(intmax_t)); i++) {
 		IS_VALUE(results[i]) {
 			printf("%zu: %jd\n", i, VALUE(results[i]));
 		} else {