diff --git a/src/lib.rs b/src/lib.rs
index d751034..9548eb5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,4 @@
+/// this is to add one to the number that is passed in
 #[no_mangle]
 pub extern "C" fn add_one(x: u32) -> u32 {
     x + 1