diff --git a/macros/coords.asm b/macros/coords.asm
index 777e798c9..1eccd9139 100644
--- a/macros/coords.asm
+++ b/macros/coords.asm
@@ -53,3 +53,8 @@ lda_coord: MACRO
 	ld a, [(\2) screenrows + (\1) + \3]
 	endc
 ENDM
+
+ld_dims: MACRO
+; register, width, height
+	lb \1, \3, \2
+ENDM