diff --git a/plugins/nmount b/plugins/nmount
index ce9f99e6..8a12742c 100755
--- a/plugins/nmount
+++ b/plugins/nmount
@@ -19,6 +19,7 @@ fi
 echo
 
 if grep -qs "$dev " /proc/mounts; then
+    sync
     pumount "$dev"
     if [ "$?" -eq "0" ]; then
         udisksctl power-off -b /dev/"$dev"