diff --git a/src/lib/coapcore/src/seccontext.rs b/src/lib/coapcore/src/seccontext.rs
index ab4e34dc5..cbf63e0b1 100644
--- a/src/lib/coapcore/src/seccontext.rs
+++ b/src/lib/coapcore/src/seccontext.rs
@@ -720,7 +720,7 @@ impl<'a, H: coap_handler::Handler, Crypto: lakers::Crypto> coap_handler::Handler
                 // for.)
 
                 // embedded-nal-coap uses this max size, and our messages are same size or smaller,
-                // so it's a guarnteed fit.
+                // so it's a guaranteed fit.
                 const MAX_SIZE: usize = 1152;
                 let mut read_copy = [0u8; MAX_SIZE];
                 let mut code_copy = 0;