diff --git a/src/kernel/memory/vmm.c b/src/kernel/memory/vmm.c
index c26049e..87b9058 100644
--- a/src/kernel/memory/vmm.c
+++ b/src/kernel/memory/vmm.c
@@ -82,4 +82,24 @@ void free_page(void *P4, uintptr_t addr, int free)
     ))
     return;
   P1e(P4, addr).value = 0;
+
+  union PTE *pt;
+
+  pt = PT(P2e(P4, addr).value);
+  for(int i = 0; i < ENTRIES_PER_PT; i++)
+    if(pt[i].value)
+      return;
+  P2e(P4, addr).value = 0;
+
+  pt = PT(P3e(P4, addr).value);
+  for(int i = 0; i < ENTRIES_PER_PT; i++)
+    if(pt[i].value)
+      return;
+  P3e(P4, addr).value = 0;
+
+  pt = PT(P4e(P4, addr).value);
+  for(int i = 0; i < ENTRIES_PER_PT; i++)
+    if(pt[i].value)
+      return;
+  P4e(P4, addr).value = 0;
 }
diff --git a/src/kernel/memory/vmm.tt b/src/kernel/memory/vmm.tt
index 29284c5..d8a9ffa 100644
--- a/src/kernel/memory/vmm.tt
+++ b/src/kernel/memory/vmm.tt
@@ -137,3 +137,12 @@ TEST(free_page_unsets_page)
 
   ASSERT_EQ_PTR(p1[4], 0);
 }
+TEST(free_page_unsets_P2_entry_if_P1_is_empty)
+{
+  BUILD_PT(1,2,3);
+  p1[4] = PAGE_PRESENT;
+
+  free_page(p4, ADDR1234, 1);
+
+  ASSERT_EQ_PTR(p2[3], 0);
+}