diff --git a/core b/core
index 05e90da..5fd6e1b 160000
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 05e90da34584f98a6b7d46f7b22e8701a5b3d285
+Subproject commit 5fd6e1b11239b1d24b6c1a18cbfb6c7f876acc96
diff --git a/drawing/Graphics.lua b/drawing/Graphics.lua
index 236493a..fd1dcff 100644
--- a/drawing/Graphics.lua
+++ b/drawing/Graphics.lua
@@ -234,7 +234,7 @@ local update = function(cr)
 		-- no optirun processes, we call this "Mixed." In this case we don't
 		-- check anything (to allow bbswitch to actually switch off) and set all
 		-- values to N/A and 0.
-		if __string_find(Util.execute_cmd('ps -A -o comm'), 'optirun') == nil then
+		if not __string_find(Util.execute_cmd('ps -A -o comm'), 'optirun') then
 			Text.set(status.value, cr, 'Mixed')
 			nvidia_off(cr)
 		else