diff --git a/firmware/target/arm/sandisk/ata-c200_e200.c b/firmware/target/arm/sandisk/ata-c200_e200.c
index fa0d31553f..ea6c2c5eaf 100644
--- a/firmware/target/arm/sandisk/ata-c200_e200.c
+++ b/firmware/target/arm/sandisk/ata-c200_e200.c
@@ -1101,6 +1101,9 @@ static void sd_thread(void)
             usb_wait_for_disconnect(&sd_queue);
 #endif
             break;
+        case SYS_USB_DISCONNECTED:
+            usb_acknowledge(SYS_USB_DISCONNECTED_ACK);
+            break;
         }
     }
 }