diff --git a/dlls/ntoskrnl.exe/ntoskrnl.c b/dlls/ntoskrnl.exe/ntoskrnl.c
index 7bb96fbb595..23379b8b531 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.c
+++ b/dlls/ntoskrnl.exe/ntoskrnl.c
@@ -1927,3 +1927,12 @@ VOID WINAPI IoStartNextPacket(PDEVICE_OBJECT deviceobject, BOOLEAN cancelable)
 {
     FIXME("(%p %d) stub\n", deviceobject, cancelable);
 }
+
+/*****************************************************
+ *           ObQueryNameString  (NTOSKRNL.EXE.@)
+ */
+NTSTATUS WINAPI ObQueryNameString(PVOID object, POBJECT_NAME_INFORMATION name, ULONG maxlength, PULONG returnlength)
+{
+    FIXME("(%p %p %u %p) stub\n", object, name, maxlength, returnlength);
+    return STATUS_NOT_IMPLEMENTED;
+}
diff --git a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
index 11aaa2ba4c3..1512cf82bdd 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
+++ b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
@@ -807,7 +807,7 @@
 @ stub ObMakeTemporaryObject
 @ stub ObOpenObjectByName
 @ stub ObOpenObjectByPointer
-@ stub ObQueryNameString
+@ stdcall ObQueryNameString(ptr ptr long ptr)
 @ stub ObQueryObjectAuditingByHandle
 @ stdcall ObReferenceObjectByHandle(long long ptr long ptr ptr)
 @ stdcall ObReferenceObjectByName(ptr long ptr long ptr long ptr ptr)
diff --git a/include/ddk/ntifs.h b/include/ddk/ntifs.h
index 37ec637c4f7..a8d90a1d5c0 100644
--- a/include/ddk/ntifs.h
+++ b/include/ddk/ntifs.h
@@ -28,4 +28,6 @@ typedef struct _KQUEUE
   LIST_ENTRY ThreadListHead;
 } KQUEUE, *PKQUEUE, *RESTRICTED_POINTER PRKQUEUE;
 
+NTSTATUS WINAPI ObQueryNameString(PVOID,POBJECT_NAME_INFORMATION,ULONG,PULONG);
+
 #endif