diff --git a/Installation_guide.mw b/Installation_guide.mw
index 5705ccbc81977477e880c47d5ae1e5b5377eadf0..3862189e05a2572cbd5d3114936a7d8f3996ca23 100644
--- a/Installation_guide.mw
+++ b/Installation_guide.mw
@@ -103,7 +103,7 @@ This command wraps various flash programs (e.g. fastboot and heimdall) with a co
 $ pmbootstrap flasher flash_rootfs
 </syntaxhighlight>
 
-In case your system partition is too small for the generated image (e.g. because you chose Plasma Mobile as UI), it is possible to flash to another partition as well. Just be sure to erase any previous installations of postmarketOS in other partitions, because the init script will start with the first one that it encounters. (To delete a previous version either use <code>dd</code> or simply install the known working OS, e.g. Android, on it). Using multiple partitions with LVM is planned ({{github|60}}).
+In case your system partition is too small for the generated image (e.g. because you chose Plasma Mobile as UI), it is possible to flash to another partition as well. Just be sure to erase any previous installations of postmarketOS in other partitions, because the init script will start with the first one that it encounters. (To delete a previous version either use <code>fastboot format system</code> for fastboot compatible devices, or simply install the known working OS, e.g. Android, on it. And if you really know what you are doing, you might consider using <code>dd</code>). Using multiple partitions with LVM is planned ({{github|60}}).
 <syntaxhighlight lang="shell-session">
 $ pmbootstrap flasher flash_rootfs --partition userdata
 </syntaxhighlight>