diff --git a/a8/sysutils.h b/a8/sysutils.h
index 55fe1f6..71ead55 100644
--- a/a8/sysutils.h
+++ b/a8/sysutils.h
@@ -49,7 +49,7 @@ namespace a8
     }
 
     template <typename T>
-    const T& LengthSqr(const T& v)
+    float LengthSqr(const T& v)
     {
         return v.x * v.x + v.y * v.y;
     }