diff --git a/core/src/arch/x86_64/thread.zig b/core/src/arch/x86_64/thread.zig
index 60fbd4f..ae89acf 100644
--- a/core/src/arch/x86_64/thread.zig
+++ b/core/src/arch/x86_64/thread.zig
@@ -51,8 +51,9 @@ pub fn setAddress(regs: *interrupts.InterruptStackFrame, address: u64) void {
     regs.rip = address;
 }
 
-pub fn setArgument(regs: *interrupts.InterruptStackFrame, argument: u64) void {
-    regs.rdi = argument;
+pub fn setArguments(regs: *interrupts.InterruptStackFrame, arg0: u64, arg1: u64) void {
+    regs.rdi = arg0;
+    regs.rsi = arg1;
 }
 
 pub fn setStack(regs: *interrupts.InterruptStackFrame, stack: u64) void {
diff --git a/core/src/main.zig b/core/src/main.zig
index 7b88bee..30db693 100644
--- a/core/src/main.zig
+++ b/core/src/main.zig
@@ -71,7 +71,7 @@ export fn _start(magic: u32, info: MultibootInfo) callconv(.C) noreturn {
     init.mapper = mapper;
     init.user_priority = 255;
     thread.arch.initUserRegisters(&init.regs);
-    thread.arch.setArgument(&init.regs, base);
+    thread.arch.setArguments(&init.regs, base, mapper.phys.address);
 
     const ctx = Context{ .allocator = &allocator, .mapper = mapper, .regs = &init.regs };