diff --git a/embassy-boot/boot/src/firmware_updater/blocking.rs b/embassy-boot/boot/src/firmware_updater/blocking.rs
index 15e314ae..f354ed3e 100644
--- a/embassy-boot/boot/src/firmware_updater/blocking.rs
+++ b/embassy-boot/boot/src/firmware_updater/blocking.rs
@@ -187,9 +187,9 @@ impl<'d, DFU: NorFlash, STATE: NorFlash> BlockingFirmwareUpdater<'d, DFU, STATE>
         //assert!(data.len() >= DFU::ERASE_SIZE);
         self.state.verify_booted()?;
 
-        //self.dfu.erase(offset as u32, (offset + data.len()) as u32)?;
+        self.dfu.erase(offset as u32, (offset + DFU::ERASE_SIZE) as u32)?;
 
-        if self.dfu.write(offset as u32 + 0x08100000, data).is_err() {
+        if self.dfu.write(offset as u32, data).is_err() {
             panic!("range: {:?}", offset..offset+data.len());
         }