diff --git a/src/system/boot/platform/bios_ia32/devices.cpp b/src/system/boot/platform/bios_ia32/devices.cpp
index 53a7dd6af5..a8cfd1b8c9 100644
--- a/src/system/boot/platform/bios_ia32/devices.cpp
+++ b/src/system/boot/platform/bios_ia32/devices.cpp
@@ -541,7 +541,8 @@ add_block_devices(NodeList *devicesList, bool identifierMissing)
 
 BIOSDrive::BIOSDrive(uint8 driveID)
 	:
-	fDriveID(driveID)
+	fDriveID(driveID),
+	fSize(0)
 {
 	TRACE(("drive ID %u\n", driveID));