diff --git a/include/zephyr/lorawan/lorawan.h b/include/zephyr/lorawan/lorawan.h
index 924ed6ec276..519e6e4bea1 100644
--- a/include/zephyr/lorawan/lorawan.h
+++ b/include/zephyr/lorawan/lorawan.h
@@ -107,7 +107,7 @@ struct lorawan_join_otaa {
 	 * increasing for each OTAA join with the same EUI. The DevNonce
 	 * should be stored in non-volatile memory by the application.
 	 */
-	uint32_t dev_nonce;
+	uint16_t dev_nonce;
 };
 
 /**