diff --git a/_posts/2015-08-18-multiboot-kernel.md b/_posts/2015-08-18-multiboot-kernel.md
index bf5abccc..001e222d 100644
--- a/_posts/2015-08-18-multiboot-kernel.md
+++ b/_posts/2015-08-18-multiboot-kernel.md
@@ -209,7 +209,7 @@ Now it's time to boot our OS. We will use [QEMU]:
 [QEMU]: https://en.wikipedia.org/wiki/QEMU
 
 ```
-qemu-system-x86_64 -hda os.iso
+qemu-system-x86_64 -drive format=raw,file=os.iso
 ```
 ![qemu output](/images/qemu-ok.png)
 
@@ -263,7 +263,7 @@ clean:
     @rm -r build
 
 run: $(iso)
-    @qemu-system-x86_64 -hda $(iso)
+    @qemu-system-x86_64 -drive format=raw,file=$(iso)
 
 iso: $(iso)
 
diff --git a/_posts/2015-09-02-setup-rust.md b/_posts/2015-09-02-setup-rust.md
index a8fed00f..0221944a 100644
--- a/_posts/2015-09-02-setup-rust.md
+++ b/_posts/2015-09-02-setup-rust.md
@@ -231,7 +231,7 @@ Such a boot loop is most likely caused by some [CPU exception][exception table].
 [Triple Fault]: http://wiki.osdev.org/Triple_Fault
 
 ```
-> qemu-system-x86_64 -d int -no-reboot -hda build/os-x86_64.iso
+> qemu-system-x86_64 -d int -no-reboot -drive format=raw,file=build/os-x86_64.iso
 SMM: enter
 ...
 SMM: after RSM