diff --git a/vlib/io/reader.v b/vlib/io/reader.v
index 1b9e11719b..efd705bbfa 100644
--- a/vlib/io/reader.v
+++ b/vlib/io/reader.v
@@ -29,8 +29,8 @@ mut:
 	read(mut buf []u8) !int
 }
 
-const read_all_len = 10 * 1024
-const read_all_grow_len = 1024
+pub const read_all_len = 10 * 1024
+pub const read_all_grow_len = 1024
 
 // ReadAllConfig allows options to be passed for the behaviour
 // of read_all.