diff --git a/Logs/Remote.hs b/Logs/Remote.hs
index a2e6049a86..4f83293612 100644
--- a/Logs/Remote.hs
+++ b/Logs/Remote.hs
@@ -95,7 +95,7 @@ prop_parse_show_Config c
 	-- whitespace and '=' are not supported in config keys
 	| any (\k -> any isSpace k || elem '=' k) (M.keys c) = True
 	-- limit to alphanumerics for simplicity
-	| any (all isAlphaNum) (M.keys c) = True
+	| any (not . all isAlphaNum) (M.keys c) = True
 	| otherwise = A.parseOnly remoteConfigParser (encodeBS $ showConfig c) ~~ Right c
   where
 	normalize v = sort . M.toList <$> v