diff --git a/examples/device/cdc_msc/src/msc_disk.c b/examples/device/cdc_msc/src/msc_disk.c
index 877154773..503baace9 100644
--- a/examples/device/cdc_msc/src/msc_disk.c
+++ b/examples/device/cdc_msc/src/msc_disk.c
@@ -28,6 +28,7 @@
 
 #if CFG_TUD_MSC
 
+// whether host does safe-eject
 static bool ejected = false;
 
 // Some MCU doesn't have enough 8KB SRAM to store the whole disk
@@ -139,7 +140,7 @@ bool tud_msc_test_unit_ready_cb(uint8_t lun)
 {
   (void) lun;
 
-  // RAM disk is ready until is not ejected
+  // RAM disk is ready until ejected
   if (ejected) {
     tud_msc_set_sense(lun, SCSI_SENSE_NOT_READY, 0x3a, 0x00);
     return false;