diff --git a/common/patches/rof.cpp b/common/patches/rof.cpp
index da453bffe..f528435f9 100644
--- a/common/patches/rof.cpp
+++ b/common/patches/rof.cpp
@@ -5781,8 +5781,9 @@ namespace RoF
 				break;
 			}
 			case invtype::typeWorld: {
+				server_slot = EQEmu::invslot::WORLD_BEGIN; // evidently, [4,-1,-1,-1] is sent when world object is in experimental mode and combine is clicked
 				if (rof_slot.Slot >= invslot::SLOT_BEGIN && rof_slot.Slot < invtype::WORLD_SIZE) {
-					server_slot = EQEmu::invslot::SHARED_BANK_BEGIN + rof_slot.Slot;
+					server_slot += rof_slot.Slot;
 				}
 
 				break;
@@ -5949,8 +5950,9 @@ namespace RoF
 				break;
 			}
 			case invtype::typeWorld: {
+				server_slot = EQEmu::invslot::WORLD_BEGIN; // evidently, [4,-1,-1,-1] is sent when world object is in experimental mode and combine is clicked
 				if (rof_slot.Slot >= invslot::SLOT_BEGIN && rof_slot.Slot < invtype::WORLD_SIZE) {
-					server_slot = EQEmu::invslot::SHARED_BANK_BEGIN + rof_slot.Slot;
+					server_slot += rof_slot.Slot;
 				}
 
 				break;
diff --git a/common/patches/rof2.cpp b/common/patches/rof2.cpp
index 1632daf3b..de1f139c3 100644
--- a/common/patches/rof2.cpp
+++ b/common/patches/rof2.cpp
@@ -6071,8 +6071,9 @@ namespace RoF2
 			break;
 		}
 		case invtype::typeWorld: {
+			server_slot = EQEmu::invslot::WORLD_BEGIN; // evidently, [4,-1,-1,-1] is sent when world object is in experimental mode and combine is clicked
 			if (rof2_slot.Slot >= invslot::SLOT_BEGIN && rof2_slot.Slot < invtype::WORLD_SIZE) {
-				server_slot = EQEmu::invslot::SHARED_BANK_BEGIN + rof2_slot.Slot;
+				server_slot += rof2_slot.Slot;
 			}
 
 			break;
@@ -6221,8 +6222,9 @@ namespace RoF2
 			break;
 		}
 		case invtype::typeWorld: {
+			ServerSlot = EQEmu::invslot::WORLD_BEGIN; // evidently, [4,-1,-1,-1] is sent when world object is in experimental mode and combine is clicked
 			if (rof2_slot.Slot >= invslot::SLOT_BEGIN && rof2_slot.Slot < invtype::WORLD_SIZE) {
-				ServerSlot = EQEmu::invslot::SHARED_BANK_BEGIN + rof2_slot.Slot;
+				ServerSlot += rof2_slot.Slot;
 			}
 
 			break;