diff --git a/res/spritesheets.properties b/res/spritesheets.properties
index 83ef472..8d8d09e 100644
--- a/res/spritesheets.properties
+++ b/res/spritesheets.properties
@@ -134,3 +134,5 @@ atcs.spritesheet.monsters_newb_4.category=monster
 atcs.spritesheet.monsters_newb_4.sizex=32
 atcs.spritesheet.monsters_newb_4.sizey=64
 atcs.spritesheet.monsters_1x2.category=monster
+atcs.spritesheet.monsters_1x2.sizex=32
+atcs.spritesheet.monsters_1x2.sizey=64