diff --git a/src/sys/boot/bootsec.asm b/src/sys/boot/bootsec.asm
index 2216680..b84f139 100755
--- a/src/sys/boot/bootsec.asm
+++ b/src/sys/boot/bootsec.asm
@@ -224,7 +224,7 @@
 ;	EDX high half cleared
 ;	ESI = 0
 
-	pusha
+	pushad
 
 	cdq			;edx = 0
 	movzx	ebx, byte [SectorsPerTrack]
@@ -246,7 +246,7 @@
 	int     13h
 	 jc     retry
 
-	popa
+	popad
 
 	ret