diff --git a/libraries/DataFlash/DataFlash_File.cpp b/libraries/DataFlash/DataFlash_File.cpp
index 02adc05be6..a5db45a21c 100644
--- a/libraries/DataFlash/DataFlash_File.cpp
+++ b/libraries/DataFlash/DataFlash_File.cpp
@@ -648,7 +648,7 @@ void DataFlash_File::_io_timer(void)
           chunk, ensuring the directory entry is updated after each
           write.
          */
-#if CONFIG_HAL_BOARD != HAL_BOARD_AVR_SITL
+#if CONFIG_HAL_BOARD != HAL_BOARD_AVR_SITL && CONFIG_HAL_BOARD_SUBTYPE != HAL_BOARD_SUBTYPE_LINUX_NONE
         ::fsync(_write_fd);
 #endif
         BUF_ADVANCEHEAD(_writebuf, nwritten);