diff --git a/sortix/ata.cpp b/sortix/ata.cpp
index 173e6698..d7ffee1d 100644
--- a/sortix/ata.cpp
+++ b/sortix/ata.cpp
@@ -75,6 +75,8 @@ namespace Sortix
 		void DetectBus(unsigned busid, uint16_t ioport, uint16_t altio)
 		{
 			ATABus* bus = ATA::CreateBus(ioport, altio);
+			if ( !bus )
+				return;
 			DetectDrive(busid, bus, 0);
 			DetectDrive(busid, bus, 1);
 		}