diff --git a/boot0.s b/boot0.s
index 001c056..0f16081 100644
--- a/boot0.s
+++ b/boot0.s
@@ -10,7 +10,7 @@
 ; R | 0x080000 - 0x0a0000: extended bios data area (maximum possible size)
 ; R | 0x0a0000 - 0x0c0000: video memory
 ; R | 0x0c0000 - 0x0c8000: video bios
-; R | 0x0c8000 - 0x0f0000: bios expansiosn
+; R | 0x0c8000 - 0x0f0000: bios expansions
 ; R | 0x0f0000 - 0x100000: motherboard bios
 
 %include "defines.s"