diff --git a/similar/main/ai.cpp b/similar/main/ai.cpp
index 102828558..69405abea 100644
--- a/similar/main/ai.cpp
+++ b/similar/main/ai.cpp
@@ -4246,6 +4246,7 @@ static void set_player_awareness_all(void)
 		}
 }
 
+#ifndef NDEBUG
 #if PARALLAX
 int Ai_dump_enable = 0;
 
@@ -4316,6 +4317,7 @@ static inline void dump_ai_objects_all()
 {
 }
 #endif
+#endif
 
 // ----------------------------------------------------------------------------------
 // Do things which need to get done for all AI objects each frame.