diff --git a/Kernel/Storage/PATADiskDevice.h b/Kernel/Storage/PATADiskDevice.h
index 3db711a65a..a5c43ab821 100644
--- a/Kernel/Storage/PATADiskDevice.h
+++ b/Kernel/Storage/PATADiskDevice.h
@@ -37,7 +37,7 @@
 namespace Kernel {
 
 class IDEController;
-
+class IDEChannel;
 class PATADiskDevice final : public StorageDevice {
     friend class IDEController;
     AK_MAKE_ETERNAL