diff --git a/libraries/AP_HAL_ChibiOS/Storage.cpp b/libraries/AP_HAL_ChibiOS/Storage.cpp
index 7f8fc2819b..dc0ce2f074 100644
--- a/libraries/AP_HAL_ChibiOS/Storage.cpp
+++ b/libraries/AP_HAL_ChibiOS/Storage.cpp
@@ -421,12 +421,7 @@ bool Storage::_flash_erase_sector(uint8_t sector)
     // erasing a page can take long enough that USB may not initialise properly if it happens
     // while the host is connecting. Only do a flash erase if we have been up for more than 4s
     for (uint8_t i=0; i<STORAGE_FLASH_RETRIES; i++) {
-        /*
-          a sector erase stops the whole MCU. We need to setup a long
-          expected delay, and not only when running in the main
-          thread.  We can't use EXPECT_DELAY_MS() as it checks we are
-          in the main thread
-         */
+        // a sector erase stops the whole MCU so set up a long expected delay
         EXPECT_DELAY_MS(1000);
 #if AP_FLASH_STORAGE_DOUBLE_PAGE
         if (hal.flash->erasepage(_flash_page+sector) && hal.flash->erasepage(_flash_page+sector+1)) {