diff --git a/files/settings-default.cfg b/files/settings-default.cfg
index 143523750..b9fb2fbf7 100644
--- a/files/settings-default.cfg
+++ b/files/settings-default.cfg
@@ -933,13 +933,15 @@ object shadows = false
 enable indoor shadows = true
 
 [Physics]
-# how much background thread to use in the physics solver. 0 to disable (i.e solver run in the main thread)
+# Set the number of background threads used for physics.
+# If no background threads are used, physics calculations are processed in the main thread
+# and the settings below have no effect.
 async num threads = 0
 
-# maintain a cache of lineofsight request in the bacground physics thread
-# determines for how much frames an inactive lineofsight request should be kept updated in the cache
-# -1 to disable (i.e the LOS will be calculated only on request)
+# Set the number of frames an inactive line-of-sight request will be kept
+# refreshed in the background physics thread cache.
+# If this is set to -1, line-of-sight requests are never cached.
 lineofsight keep inactive cache = 0
 
-# wether to defer aabb update till before collision detection
+# Defer bounding boxes update until collision detection.
 defer aabb update = true