diff --git a/Cargo.toml b/Cargo.toml
index 527505c..4c6e0ce 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,3 +11,4 @@ keywords = ["embedded", "url", "no_std"]
 exclude = [".github"]
 
 [dependencies]
+defmt = { version = "0.3", optional = true }
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
index 9a51da0..7210025 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -12,6 +12,7 @@ pub struct Url<'a> {
 }
 
 #[derive(PartialEq, Eq, Clone, Copy, Debug)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum UrlScheme {
     /// HTTP scheme
     HTTP,