diff --git a/kernel/src/memory/AddressSpace.cpp b/kernel/src/memory/AddressSpace.cpp
index 5cf92f8c..8e9debc1 100644
--- a/kernel/src/memory/AddressSpace.cpp
+++ b/kernel/src/memory/AddressSpace.cpp
@@ -12,6 +12,7 @@ AddressSpace AddressSpace::create()
 {
     AddressSpace result;
     result.m_pml4 = (PageTable*)PMM::request_page();
+    memset(result.m_pml4, 0, PAGE_SIZE);
     VMM::install_kernel_page_directory_into_address_space(result);
     return move(result);
 }
diff --git a/kernel/src/memory/VMM.cpp b/kernel/src/memory/VMM.cpp
index 90c00f2c..605c17e2 100644
--- a/kernel/src/memory/VMM.cpp
+++ b/kernel/src/memory/VMM.cpp
@@ -281,7 +281,8 @@ void VMM::install_kernel_page_directory_into_address_space(AddressSpace& space)
 
     if (!space_last_pdp_pde.present)
     {
-        space_last_pdp = (PageTable*)PMM::request_page();
+        space_last_pdp = (PageTable*)PMM::request_page(); // FIXME: Add out-of-memory checks.
+        memset(space_last_pdp, 0, PAGE_SIZE);
 
         space_last_pdp_pde.present = true;
         space_last_pdp_pde.read_write = true;