diff --git a/src/impls.rs b/src/impls.rs
index 5669f12..8106a59 100644
--- a/src/impls.rs
+++ b/src/impls.rs
@@ -2,6 +2,7 @@ mod array;
 mod core;
 mod hex;
 mod ixx;
+mod marker;
 mod nz;
 mod ptr;
 #[cfg(feature = "std")]
diff --git a/src/impls/marker.rs b/src/impls/marker.rs
new file mode 100644
index 0000000..a9a9eea
--- /dev/null
+++ b/src/impls/marker.rs
@@ -0,0 +1,13 @@
+use crate::{uDebug, uWrite, Formatter};
+use core::{any::type_name, marker::PhantomData};
+
+impl<T> uDebug for PhantomData<T> {
+    fn fmt<W>(&self, f: &mut Formatter<'_, W>) -> Result<(), W::Error>
+    where
+        W: uWrite + ?Sized,
+    {
+        f.write_str("PhantomData<")?;
+        f.write_str(type_name::<T>())?;
+        f.write_str("}")
+    }
+}