diff --git a/inventoryManager.lua b/inventoryManager.lua
index 52a688f..31803e5 100644
--- a/inventoryManager.lua
+++ b/inventoryManager.lua
@@ -8,7 +8,7 @@ local MONITOR_SIDE  = "left"
 local SCAN_INTERVAL = 120  -- seconds between full background scans
 local SMELT_INTERVAL = 3   -- seconds between furnace checks
 local SMELT_RESERVE  = 64  -- keep at least 1 stack of each raw material
-local DEFRAG_INTERVAL = 60 -- seconds between defrag passes
+local DEFRAG_INTERVAL = 600 -- seconds between defrag passes (10 min)
 local COMPOST_INTERVAL = 3  -- seconds between composter checks
 local ALERT_INTERVAL  = 15 -- seconds between alert re-checks
 local CACHE_FILE     = ".inventory_cache"  -- persistent cache file