diff --git a/TOOLS/lua/status-line.lua b/TOOLS/lua/status-line.lua
index 4c1d8b842c..fd2f539861 100644
--- a/TOOLS/lua/status-line.lua
+++ b/TOOLS/lua/status-line.lua
@@ -43,7 +43,7 @@ local function update_status_line()
         atsl(string.format(" x%4.2f", r))
     end
 
-    r = mp.get_property_number("avsync", nil)
+    r = mp.get_property_number("avsync")
     if r ~= nil then
         atsl(string.format(" A-V: %f", r))
     end
diff --git a/player/lua/osc.lua b/player/lua/osc.lua
index ebfa830a92..fca530a850 100644
--- a/player/lua/osc.lua
+++ b/player/lua/osc.lua
@@ -2096,7 +2096,7 @@ local function osc_init()
     ne.enabled = mp.get_property("percent-pos") ~= nil
     state.slider_element = ne.enabled and ne or nil  -- used for forced_title
     ne.slider.markerF = function ()
-        local duration = mp.get_property_number("duration", nil)
+        local duration = mp.get_property_number("duration")
         if duration ~= nil then
             local chapters = mp.get_property_native("chapter-list", {})
             local markers = {}
@@ -2109,9 +2109,9 @@ local function osc_init()
         end
     end
     ne.slider.posF =
-        function () return mp.get_property_number("percent-pos", nil) end
+        function () return mp.get_property_number("percent-pos") end
     ne.slider.tooltipF = function (pos)
-        local duration = mp.get_property_number("duration", nil)
+        local duration = mp.get_property_number("duration")
         if duration ~= nil and pos ~= nil then
             local possec = duration * (pos / 100)
             return mp.format_time(possec)
@@ -2127,7 +2127,7 @@ local function osc_init()
         if not cache_state then
             return nil
         end
-        local duration = mp.get_property_number("duration", nil)
+        local duration = mp.get_property_number("duration")
         if duration == nil or duration <= 0 then
             return nil
         end
@@ -2985,7 +2985,7 @@ opt.read_options(user_opts, "osc", function(changed)
     validate_user_opts()
     set_osc_styles()
     if changed.tick_delay or changed.tick_delay_follow_display_fps then
-        set_tick_delay("display_fps", mp.get_property_number("display_fps", nil))
+        set_tick_delay("display_fps", mp.get_property_number("display_fps"))
     end
     request_tick()
     visibility_mode(user_opts.visibility, true)
@@ -2995,7 +2995,7 @@ end)
 
 validate_user_opts()
 set_osc_styles()
-set_tick_delay("display_fps", mp.get_property_number("display_fps", nil))
+set_tick_delay("display_fps", mp.get_property_number("display_fps"))
 visibility_mode(user_opts.visibility, true)
 update_duration_watch()
 
diff --git a/player/lua/stats.lua b/player/lua/stats.lua
index 560dd6735b..ce2166867e 100644
--- a/player/lua/stats.lua
+++ b/player/lua/stats.lua
@@ -1452,7 +1452,7 @@ local function record_data(skip)
         end
 
         if o.plot_vsync_jitter then
-            local r = mp.get_property_number("vsync-jitter", nil)
+            local r = mp.get_property_number("vsync-jitter")
             if r then
                 vsjitter_buf.pos = (vsjitter_buf.pos % vsjitter_buf.len) + 1
                 vsjitter_buf[vsjitter_buf.pos] = r
@@ -1461,7 +1461,7 @@ local function record_data(skip)
         end
 
         if o.plot_vsync_ratio then
-            local r = mp.get_property_number("vsync-ratio", nil)
+            local r = mp.get_property_number("vsync-ratio")
             if r then
                 vsratio_buf.pos = (vsratio_buf.pos % vsratio_buf.len) + 1
                 vsratio_buf[vsratio_buf.pos] = r