diff --git a/src/conky.cc b/src/conky.cc
index 023a495f..7d25de4b 100644
--- a/src/conky.cc
+++ b/src/conky.cc
@@ -481,7 +481,7 @@ long global_text_lines;
 static int total_updates;
 static int updatereset;
 
-std::auto_ptr<lua::state> state;
+std::unique_ptr<lua::state> state;
 
 void set_updatereset(int i)
 {
diff --git a/src/conky.h b/src/conky.h
index b6aa71bd..65258349 100644
--- a/src/conky.h
+++ b/src/conky.h
@@ -349,7 +349,7 @@ void free_and_zero(T *&ptr) {
 	}
 }
 
-extern std::auto_ptr<lua::state> state;
+extern std::unique_ptr<lua::state> state;
 
 extern int argc_copy;
 extern char** argv_copy;