diff --git a/labcodes/lab1/kern/mm/memlayout.h b/labcodes/lab1/kern/mm/memlayout.h
index 2d8455d..50bb88a 100644
--- a/labcodes/lab1/kern/mm/memlayout.h
+++ b/labcodes/lab1/kern/mm/memlayout.h
@@ -10,7 +10,7 @@
 #define SEG_UDATA    4
 #define SEG_TSS        5
 
-/* global descrptor numbers */
+/* global descriptor numbers */
 #define GD_KTEXT    ((SEG_KTEXT) << 3)        // kernel text
 #define GD_KDATA    ((SEG_KDATA) << 3)        // kernel data
 #define GD_UTEXT    ((SEG_UTEXT) << 3)        // user text
diff --git a/labcodes_answer/lab1_result/kern/mm/memlayout.h b/labcodes_answer/lab1_result/kern/mm/memlayout.h
index 2d8455d..50bb88a 100644
--- a/labcodes_answer/lab1_result/kern/mm/memlayout.h
+++ b/labcodes_answer/lab1_result/kern/mm/memlayout.h
@@ -10,7 +10,7 @@
 #define SEG_UDATA    4
 #define SEG_TSS        5
 
-/* global descrptor numbers */
+/* global descriptor numbers */
 #define GD_KTEXT    ((SEG_KTEXT) << 3)        // kernel text
 #define GD_KDATA    ((SEG_KDATA) << 3)        // kernel data
 #define GD_UTEXT    ((SEG_UTEXT) << 3)        // user text