diff --git a/rogueviz/ads/ads-game.cpp b/rogueviz/ads/ads-game.cpp
index a0d6e16f..2064ae79 100644
--- a/rogueviz/ads/ads-game.cpp
+++ b/rogueviz/ads/ads-game.cpp
@@ -23,7 +23,7 @@
 #define CAP_VR 0
 #include "../hyper.cpp"
 
-namespace rogueviz { extern std::vector<hr::reaction_t> cleanup; }
+namespace rogueviz { std::vector<hr::reaction_t> cleanup; }
 
 #endif