diff --git a/Kernel/E1000NetworkAdapter.cpp b/Kernel/E1000NetworkAdapter.cpp
index 2f04d572bc..ede54a650f 100644
--- a/Kernel/E1000NetworkAdapter.cpp
+++ b/Kernel/E1000NetworkAdapter.cpp
@@ -108,6 +108,9 @@ E1000NetworkAdapter::E1000NetworkAdapter(PCI::Address pci_address, byte irq)
 {
     s_the = this;
     kprintf("E1000: Found at PCI address %b:%b:%b\n", pci_address.bus(), pci_address.slot(), pci_address.function());
+
+    enable_bus_mastering(m_pci_address);
+
     m_mmio_base = PhysicalAddress(PCI::get_BAR0(m_pci_address));
     MM.map_for_kernel(LinearAddress(m_mmio_base.get()), m_mmio_base);
     MM.map_for_kernel(LinearAddress(m_mmio_base.offset(4096).get()), m_mmio_base.offset(4096));
diff --git a/Kernel/MemoryManager.cpp b/Kernel/MemoryManager.cpp
index bbd81491b5..1ce601bcc8 100644
--- a/Kernel/MemoryManager.cpp
+++ b/Kernel/MemoryManager.cpp
@@ -56,6 +56,9 @@ void MemoryManager::populate_page_directory(PageDirectory& page_directory)
 {
     page_directory.m_directory_page = allocate_supervisor_physical_page();
     page_directory.entries()[0] = kernel_page_directory().entries()[0];
+    // Defer to the kernel page tables for 0xC0000000-0xFFFFFFFF
+    for (int i = 768; i < 1024; ++i)
+        page_directory.entries()[i] = kernel_page_directory().entries()[i];
 }
 
 void MemoryManager::initialize_paging()
diff --git a/Kernel/PCI.cpp b/Kernel/PCI.cpp
index 685db03658..2b22cf75c6 100644
--- a/Kernel/PCI.cpp
+++ b/Kernel/PCI.cpp
@@ -103,6 +103,14 @@ dword get_BAR3(Address address) { return read_field<dword>(address, PCI_BAR3); }
 dword get_BAR4(Address address) { return read_field<dword>(address, PCI_BAR4); }
 dword get_BAR5(Address address) { return read_field<dword>(address, PCI_BAR5); }
 
+void enable_bus_mastering(Address address)
+{
+    auto value = read_field<word>(address, PCI_COMMAND);
+    value |= (1 << 2);
+    value |= (1 << 0);
+    write_field<word>(address, PCI_COMMAND, value);
+}
+
 void enumerate_all(Function<void(Address, ID)> callback)
 {
     // Single PCI host controller.
diff --git a/Kernel/PCI.h b/Kernel/PCI.h
index bb2950a049..e8330d4245 100644
--- a/Kernel/PCI.h
+++ b/Kernel/PCI.h
@@ -47,5 +47,6 @@ dword get_BAR2(Address);
 dword get_BAR3(Address);
 dword get_BAR4(Address);
 dword get_BAR5(Address);
+void enable_bus_mastering(Address);
 
 }