diff --git a/lua/hop/init.lua b/lua/hop/init.lua
index 93c8bc05..bec086dd 100644
--- a/lua/hop/init.lua
+++ b/lua/hop/init.lua
@@ -8,7 +8,7 @@ M.opts = defaults
 -- Setup user settings.
 function M.setup(opts)
   -- Look up keys in user-defined table with fallback to defaults.
-  M.opts = setmetatable(opts, {__index = defaults})
+  M.opts = setmetatable(opts or {}, {__index = defaults})
 end
 
 -- Allows to override global options with user local overrides.