diff --git a/src/engine/Makefile b/src/engine/Makefile
index 4164e49..78c621f 100644
--- a/src/engine/Makefile
+++ b/src/engine/Makefile
@@ -6,6 +6,7 @@ EE_OBJS =								\
 	models/math/point.o					\
 	models/math/vector3.o				\
 	models/mesh_frame.o					\
+	models/bounding_box.o				\
 	models/mesh_material.o				\
 	models/mesh.o						\
 	models/sprite.o						\