diff --git a/lib/std/io/reader.zig b/lib/std/io/reader.zig
index 762521cabe..b9a9eb3eeb 100644
--- a/lib/std/io/reader.zig
+++ b/lib/std/io/reader.zig
@@ -60,7 +60,12 @@ pub fn Reader(
             return self.readAllArrayListAligned(null, array_list, max_append_size);
         }
 
-        pub fn readAllArrayListAligned(self: Self, comptime alignment: ?u29, array_list: *std.ArrayListAligned(u8, alignment), max_append_size: usize) !void {
+        pub fn readAllArrayListAligned(
+            self: Self,
+            comptime alignment: ?u29,
+            array_list: *std.ArrayListAligned(u8, alignment),
+            max_append_size: usize,
+        ) !void {
             try array_list.ensureCapacity(math.min(max_append_size, 4096));
             const original_len = array_list.items.len;
             var start_index: usize = original_len;