diff --git a/samples/net/azure_iot_hub/src/main.c b/samples/net/azure_iot_hub/src/main.c
index af6c0dd569cc..e7722d355f89 100644
--- a/samples/net/azure_iot_hub/src/main.c
+++ b/samples/net/azure_iot_hub/src/main.c
@@ -507,20 +507,22 @@ static int dps_run(struct azure_iot_hub_buf *hostname, struct azure_iot_hub_buf
 int main(void)
 {
 	int err;
-	char hostname[128] = CONFIG_AZURE_IOT_HUB_HOSTNAME;
-	char device_id[128] = CONFIG_AZURE_IOT_HUB_DEVICE_ID;
-	struct azure_iot_hub_config cfg = {
+	static char hostname[128] = CONFIG_AZURE_IOT_HUB_HOSTNAME;
+	static char device_id[128] = CONFIG_AZURE_IOT_HUB_DEVICE_ID;
+	static struct azure_iot_hub_config cfg = {
 		.device_id = {
 			.ptr = device_id,
-			.size = strlen(device_id),
 		},
 		.hostname = {
 			.ptr = hostname,
-			.size = strlen(hostname),
 		},
 		.use_dps = true,
 	};
 
+	cfg.device_id.size = strlen(device_id);
+	cfg.hostname.size = strlen(hostname);
+
+
 	LOG_INF("Azure IoT Hub sample started");
 
 	/* Setup handler for Zephyr NET Connection Manager events. */