diff --git a/src/multiboot/boot.asm b/src/multiboot/boot.asm
index d502f26..6ca5009 100644
--- a/src/multiboot/boot.asm
+++ b/src/multiboot/boot.asm
@@ -19,11 +19,38 @@
 _start:
     ; setup stack for kernel main function
     mov esp, stack + KERNEL_STACK_SIZE
+    lgdt [gdt32.end]
     ; call main function
-    call kernelMain
+    call 0x08:kernelMain
 .loop:
     jmp .loop
 
+section .data
+
+ALIGN 4
+ 
+gdt32:
+	dq 0
+ 
+.code:
+	dw 0xffff
+	dw 0
+	db 0
+	db 10011010b
+	db 11001111b
+	db 0
+ 
+.data:
+	dw 0xffff
+	dw 0
+	db 0
+	db 10010010b
+	db 11001111b
+	db 0
+.end:
+    dw .end - gdt32 - 1
+    dd gdt32
+
 section .bss
 align 4
 stack: