diff --git a/Kernel/CommandLine.cpp b/Kernel/CommandLine.cpp
index 9353313715..64716fb8bf 100644
--- a/Kernel/CommandLine.cpp
+++ b/Kernel/CommandLine.cpp
@@ -38,6 +38,8 @@ UNMAP_AFTER_INIT void CommandLine::initialize()
     VERIFY(!s_the);
     s_the = new CommandLine(s_cmd_line);
     dmesgln("Kernel Commandline: {}", kernel_command_line().string());
+    // Validate the boot mode the user passed in.
+    (void)s_the->boot_mode(Validate::Yes);
 }
 
 UNMAP_AFTER_INIT void CommandLine::build_commandline(const String& cmdline_from_bootloader)
@@ -191,7 +193,7 @@ UNMAP_AFTER_INIT AHCIResetMode CommandLine::ahci_reset_mode() const
     PANIC("Unknown AHCIResetMode: {}", ahci_reset_mode);
 }
 
-BootMode CommandLine::boot_mode() const
+BootMode CommandLine::boot_mode(Validate should_validate) const
 {
     const auto boot_mode = lookup("boot_mode"sv).value_or("graphical"sv);
     if (boot_mode == "no-fbdev"sv) {
@@ -201,7 +203,10 @@ BootMode CommandLine::boot_mode() const
     } else if (boot_mode == "graphical"sv) {
         return BootMode::Graphical;
     }
-    PANIC("Unknown BootMode: {}", boot_mode);
+
+    if (should_validate == Validate::Yes)
+        PANIC("Unknown BootMode: {}", boot_mode);
+    return BootMode::Unknown;
 }
 
 UNMAP_AFTER_INIT bool CommandLine::is_no_framebuffer_devices_mode() const
diff --git a/Kernel/CommandLine.h b/Kernel/CommandLine.h
index 20aaa6b9cc..35d70e3db7 100644
--- a/Kernel/CommandLine.h
+++ b/Kernel/CommandLine.h
@@ -16,7 +16,8 @@ namespace Kernel {
 enum class BootMode {
     NoFramebufferDevices,
     SelfTest,
-    Graphical
+    Graphical,
+    Unknown,
 };
 
 enum class HPETMode {
@@ -48,6 +49,11 @@ public:
     static void early_initialize(const char* cmd_line);
     static void initialize();
 
+    enum class Validate {
+        Yes,
+        No,
+    };
+
     [[nodiscard]] const String& string() const { return m_string; }
     Optional<String> lookup(const StringView& key) const;
     [[nodiscard]] bool contains(const StringView& key) const;
@@ -62,7 +68,7 @@ public:
     [[nodiscard]] bool is_no_framebuffer_devices_mode() const;
     [[nodiscard]] bool is_force_pio() const;
     [[nodiscard]] AcpiFeatureLevel acpi_feature_level() const;
-    [[nodiscard]] BootMode boot_mode() const;
+    [[nodiscard]] BootMode boot_mode(Validate should_validate = Validate::No) const;
     [[nodiscard]] HPETMode hpet_mode() const;
     [[nodiscard]] bool disable_physical_storage() const;
     [[nodiscard]] bool disable_ps2_controller() const;