diff --git a/system-config/75-qubes-dom0.preset b/system-config/75-qubes-dom0.preset
index 9d24ff9..4f422b0 100644
--- a/system-config/75-qubes-dom0.preset
+++ b/system-config/75-qubes-dom0.preset
@@ -16,6 +16,7 @@ enable lvm2-monitor.*
 enable lvm2-lvmetad.*
 enable dm-event.*
 enable dmraid-activation.service
+enable fstrim.timer
 
 
 enable abrtd.service