diff --git a/i386/legacy-boot/src-asm/memory/gdt.asm b/i386/legacy-boot/src-asm/memory/gdt.asm
index 3cf15f5..10933db 100755
--- a/i386/legacy-boot/src-asm/memory/gdt.asm
+++ b/i386/legacy-boot/src-asm/memory/gdt.asm
@@ -27,7 +27,7 @@ GDT_ENTRY_COUNT equ 3
 make_regular_data_segment_in_gdt:
 .prolog:
     push esi
-    add esp, 64
+    sub esp, 64
     mov esi, esp
 
     mov [esi + (64 - 4)], eax
@@ -98,7 +98,7 @@ make_regular_data_segment_in_gdt:
     mov ebx, [esi + (64 - 8)]
     mov eax, [esi + (64 - 4)]
 
-    sub esp, 64
+    add esp, 64
     pop esi
     ret
 
@@ -134,7 +134,7 @@ make_regular_data_segment_in_gdt:
 make_code_segment_in_gdt:
 .prolog:
     push esi
-    add esp, 64
+    sub esp, 64
     mov esi, esp
 
     mov [esi + (64 - 4)], eax
@@ -205,7 +205,7 @@ make_code_segment_in_gdt:
     mov ebx, [esi + (64 - 8)]
     mov eax, [esi + (64 - 4)]
 
-    sub esp, 64
+    add esp, 64
     pop esi
     ret
 
@@ -224,7 +224,7 @@ make_code_segment_in_gdt:
 load_flat_gdt:
 .prolog:
     push esi
-    add esp, 64
+    sub esp, 64
     mov esi, esp
 
     mov [esi + (64 - 4)], eax