diff --git a/dlls/ntoskrnl.exe/ntoskrnl.c b/dlls/ntoskrnl.exe/ntoskrnl.c
index 78df9f17f24..2285ec695aa 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.c
+++ b/dlls/ntoskrnl.exe/ntoskrnl.c
@@ -33,6 +33,7 @@
 #include "winternl.h"
 #include "excpt.h"
 #include "winioctl.h"
+#include "ddk/csq.h"
 #include "ddk/ntddk.h"
 #include "ddk/ntifs.h"
 #include "wine/unicode.h"
@@ -1996,3 +1997,15 @@ NTSTATUS WINAPI IoRegisterPlugPlayNotification(IO_NOTIFICATION_EVENT_CATEGORY ca
     FIXME("(%u %u %p %p %p %p %p) stub\n", category, flags, data, driver, callback, context, notification);
     return STATUS_SUCCESS;
 }
+
+/*****************************************************
+ *           IoCsqInitialize  (NTOSKRNL.EXE.@)
+ */
+NTSTATUS WINAPI IoCsqInitialize(PIO_CSQ csq, PIO_CSQ_INSERT_IRP insert_irp, PIO_CSQ_REMOVE_IRP remove_irp,
+                                PIO_CSQ_PEEK_NEXT_IRP peek_irp, PIO_CSQ_ACQUIRE_LOCK acquire_lock,
+                                PIO_CSQ_RELEASE_LOCK release_lock, PIO_CSQ_COMPLETE_CANCELED_IRP complete_irp)
+{
+    FIXME("(%p %p %p %p %p %p %p) stub\n",
+          csq, insert_irp, remove_irp, peek_irp, acquire_lock, release_lock, complete_irp);
+    return STATUS_SUCCESS;
+}
diff --git a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
index 3bcf21c8393..228da2951cd 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
+++ b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
@@ -348,7 +348,7 @@
 @ stdcall IoCreateSymbolicLink(ptr ptr)
 @ stdcall IoCreateSynchronizationEvent(ptr ptr)
 @ stub IoCreateUnprotectedSymbolicLink
-@ stub IoCsqInitialize
+@ stdcall IoCsqInitialize(ptr ptr ptr ptr ptr ptr ptr)
 @ stub IoCsqInsertIrp
 @ stub IoCsqRemoveIrp
 @ stub IoCsqRemoveNextIrp