diff --git a/src/img.h b/src/img.h
index 96539da..432ac19 100644
--- a/src/img.h
+++ b/src/img.h
@@ -5,7 +5,7 @@
 #include "mem_arena.h"
 #include <stdbool.h>
 
-#define BUF_TYPE(NAME, TYPE)                                                   \
+#define BUF_TYPE(TYPE, NAME)                                                   \
   typedef struct {                                                             \
     u64 width;                                                                 \
     u64 height;                                                                \
@@ -20,9 +20,9 @@ struct colour {
   u8 a;
 };
 
-BUF_TYPE(Buffer, void);
-BUF_TYPE(Image, Colour);
-BUF_TYPE(Depth, f32);
+BUF_TYPE(void, Buffer);
+BUF_TYPE(Colour, Image);
+BUF_TYPE(f32, Depth);
 
 #define init_buffer(ARENA, BUF)                                                \
   _init_buffer(ARENA, (Buffer *)BUF, sizeof(*((BUF)->buf)))