diff --git a/src/any.rs b/src/any.rs
index 45ad5cc..5b5e6e6 100644
--- a/src/any.rs
+++ b/src/any.rs
@@ -116,15 +116,9 @@ pub trait IntoBox<A: ?Sized + UncheckedAnyExt>: Any {
 
 macro_rules! implement {
     ($base:ident, $(+ $bounds:ident)*) => {
-        impl<'a> fmt::Debug for &'a ($base $(+ $bounds)*) {
+        impl fmt::Debug for $base $(+ $bounds)* {
             fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-                f.pad(stringify!(&($base $(+ $bounds)*)))
-            }
-        }
-
-        impl<'a> fmt::Debug for Box<$base $(+ $bounds)*> {
-            fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-                f.pad(stringify!(Box<$base $(+ $bounds)*>))
+                f.pad(stringify!($base $(+ $bounds)*))
             }
         }
 
diff --git a/src/lib.rs b/src/lib.rs
index 8e83bab..4bc330f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -427,10 +427,15 @@ mod tests {
         fn assert_send<T: Send>() { }
         fn assert_sync<T: Sync>() { }
         fn assert_clone<T: Clone>() { }
+        fn assert_debug<T: ::std::fmt::Debug>() { }
         assert_send::<Map<Any + Send>>();
         assert_send::<Map<Any + Send + Sync>>();
         assert_sync::<Map<Any + Sync>>();
         assert_sync::<Map<Any + Send + Sync>>();
+        assert_debug::<Map<Any>>();
+        assert_debug::<Map<Any + Send>>();
+        assert_debug::<Map<Any + Sync>>();
+        assert_debug::<Map<Any + Send + Sync>>();
         assert_send::<Map<CloneAny + Send>>();
         assert_send::<Map<CloneAny + Send + Sync>>();
         assert_sync::<Map<CloneAny + Sync>>();
@@ -439,5 +444,9 @@ mod tests {
         assert_clone::<Map<CloneAny + Send + Sync>>();
         assert_clone::<Map<CloneAny + Sync>>();
         assert_clone::<Map<CloneAny + Send + Sync>>();
+        assert_debug::<Map<CloneAny>>();
+        assert_debug::<Map<CloneAny + Send>>();
+        assert_debug::<Map<CloneAny + Sync>>();
+        assert_debug::<Map<CloneAny + Send + Sync>>();
     }
 }