diff --git a/source/kenbuild/src/game.cpp b/source/kenbuild/src/game.cpp
index 8b5c0da72..1cb211f20 100644
--- a/source/kenbuild/src/game.cpp
+++ b/source/kenbuild/src/game.cpp
@@ -2352,6 +2352,8 @@ void tagcode(void)
     }
 }
 
+static FORCE_INLINE int32_t sqr(int32_t a) { return a * a; }
+
 void statuslistcode(void)
 {
     short p, target, hitobject, daang, osectnum, movestat;