diff --git a/maps/sierra/items/backpack.dm b/maps/sierra/items/backpack.dm
new file mode 100644
index 0000000000000..ac89b10bf8aa0
--- /dev/null
+++ b/maps/sierra/items/backpack.dm
@@ -0,0 +1,8 @@
+/obj/item/storage/backpack
+	max_w_class = ITEM_SIZE_NORMAL
+
+/obj/item/storage/backpack/dufflebag
+	max_w_class = ITEM_SIZE_LARGE
+
+/obj/item/storage/backpack/satchel/syndie_kit
+	max_w_class = ITEM_SIZE_LARGE
diff --git a/maps/sierra/sierra.dm b/maps/sierra/sierra.dm
index d504588a22c88..79b6eff8cd5dd 100644
--- a/maps/sierra/sierra.dm
+++ b/maps/sierra/sierra.dm
@@ -67,6 +67,7 @@
 	#include "items/rigs.dm"
 	#include "items/stamps.dm"
 	#include "items/pouches.dm"
+	#include "items/backpack.dm"
 
 	#include "items/clothing/clothing.dm"
 	#include "items/clothing/exploration.dm"