diff --git a/contrib/loaders/flash/nrf5/nrf5.S b/contrib/loaders/flash/nrf5/nrf5.S
index 53551a2c2..12b1d92b5 100644
--- a/contrib/loaders/flash/nrf5/nrf5.S
+++ b/contrib/loaders/flash/nrf5/nrf5.S
@@ -19,6 +19,7 @@
 
 	.text
 	.syntax unified
+	.cpu cortex-m0
 	.thumb
 
 /*