diff --git a/source/Controls/PartitionHandle.cpp b/source/Controls/PartitionHandle.cpp
index 917584da..24c75721 100644
--- a/source/Controls/PartitionHandle.cpp
+++ b/source/Controls/PartitionHandle.cpp
@@ -375,7 +375,7 @@ int PartitionHandle::CheckGPT(u8 PartNum)
 
 			bool bootable = (memcmp(part_entry->part_type_guid, TYPE_BIOS, 16) == 0);
 
-			AddPartition("GUID-Entry", le64(part_entry->part_first_lba), le64(part_entry->part_last_lba), bootable, PARTITION_TYPE_GPT, i, GPT);
+			AddPartition("GUID-Entry", le64(part_entry->part_first_lba), le64(part_entry->part_last_lba)-le64(part_entry->part_first_lba), bootable, PARTITION_TYPE_GPT, i, GPT);
 		}
 
 		next_lba++;