diff --git a/basic-system/files/fstrim b/basic-system/files/fstrim
index b1816b2b6aeb7df5f9efd711cd7e887c65aa06bc..799586d72df0b616c986ae77a1f24c01ae2ace95 100755
--- a/basic-system/files/fstrim
+++ b/basic-system/files/fstrim
@@ -1,5 +1,5 @@
 #!/bin/sh
 set -e
 if command -v fstrim >/dev/null; then
-    fstrim -a
+    fstrim -A
 fi