diff --git a/src/main.c b/src/main.c
index b8f4541..acb3148 100644
--- a/src/main.c
+++ b/src/main.c
@@ -33,7 +33,7 @@ int main(void) {
 
   Model model =
       load_obj_file(arena, "resources/head.obj", "resources/head.pnm");
-  if (IS_NULL_MODEL(model)) {
+  if (INVALID_MODEL(model)) {
     return TINY_EXIT_MODEL_LOAD_FAILED;
   }
 
diff --git a/src/obj.h b/src/obj.h
index a66cb7c..e55ff10 100644
--- a/src/obj.h
+++ b/src/obj.h
@@ -7,7 +7,7 @@
 #include "typed_list.h"
 
 #define NULL_MODEL ((Model){0})
-#define IS_NULL_MODEL(m) (m.vertices == NULL || m.triangles == NULL)
+#define INVALID_MODEL(m) (m.vertices == NULL || m.triangles == NULL)
 
 typedef struct vertex Vertex;
 struct vertex {