diff --git a/main/demo_tasks/ota_over_mqtt_demo/ota_over_mqtt_demo.c b/main/demo_tasks/ota_over_mqtt_demo/ota_over_mqtt_demo.c
index 1a568a3..49818f6 100644
--- a/main/demo_tasks/ota_over_mqtt_demo/ota_over_mqtt_demo.c
+++ b/main/demo_tasks/ota_over_mqtt_demo/ota_over_mqtt_demo.c
@@ -1186,7 +1186,7 @@ static void processOTAEvents( void )
             }
             else
             {
-                uint8_t decodedData[ mqttFileDownloader_CONFIG_BLOCK_SIZE ];
+                static uint8_t decodedData[ mqttFileDownloader_CONFIG_BLOCK_SIZE ];
                 size_t decodedDataLength = 0;
                 MQTTFileDownloaderStatus_t xReturnStatus;
                 int16_t result = -1;