diff --git a/src/input.h b/src/input.h
index 1c72513..8fd5d97 100644
--- a/src/input.h
+++ b/src/input.h
@@ -5,7 +5,7 @@
 
 class input {
 public:
-        virtual ~input() = 0;
+        virtual ~input() = default;
         virtual game_command get_command() = 0;
 };