diff --git a/how-to-self-host-hardened-bitcoin-node/README.md b/how-to-self-host-hardened-bitcoin-node/README.md
index 0ecb5cf..85b4319 100644
--- a/how-to-self-host-hardened-bitcoin-node/README.md
+++ b/how-to-self-host-hardened-bitcoin-node/README.md
@@ -655,7 +655,7 @@ $ systemctl start bitcoind
 
 ### Step 19: install [electrs](https://github.com/romanz/electrs) (see [docs](https://github.com/romanz/electrs/blob/master/doc/install.md))
 
-> Heads-up: build will likely take more than half and hour on Raspberry Pi.
+> Heads-up: build will likely take more than half an hour on Raspberry Pi.
 
 ```console
 $ git clone https://github.com/romanz/electrs