diff --git a/signals.lua b/signals.lua
index 293f8d8..04ac055 100644
--- a/signals.lua
+++ b/signals.lua
@@ -23,7 +23,7 @@ local fixed_clients = {
 }
 
 local function may_lose_focus(c)
-    if c ~= nil then return true end
+    if c == nil then return true end
     return not awful.rules.matches_list(c, fixed_clients)
 end