diff --git a/src/arch/x86_64/paging/mapper.rs b/src/arch/x86_64/paging/mapper.rs
index 2f69bd2..5d66b7b 100644
--- a/src/arch/x86_64/paging/mapper.rs
+++ b/src/arch/x86_64/paging/mapper.rs
@@ -76,6 +76,7 @@ impl Drop for MapperFlushAll {
     }
 }
 
+#[derive(Debug)]
 pub struct Mapper {
     p4: Unique<Table<Level4>>,
 }
diff --git a/src/arch/x86_64/paging/mod.rs b/src/arch/x86_64/paging/mod.rs
index f748d97..e3cb025 100644
--- a/src/arch/x86_64/paging/mod.rs
+++ b/src/arch/x86_64/paging/mod.rs
@@ -374,6 +374,7 @@ pub unsafe fn init_ap(
     init_tcb(cpu_id)
 }
 
+#[derive(Debug)]
 pub struct ActivePageTable {
     mapper: Mapper,
     locked: bool,