diff --git a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
index 3c7a9d1950d..c4ddfb28305 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
+++ b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
@@ -546,6 +546,7 @@
 @ stub KeFindConfigurationNextEntry
 @ stub KeFlushEntireTb
 @ stdcall KeFlushQueuedDpcs()
+@ stdcall KeGetCurrentProcessorNumber() NtGetCurrentProcessorNumber
 @ stdcall KeGetCurrentThread()
 @ stub KeGetPreviousMode
 @ stub KeGetRecommendedSharedDataAlignment
diff --git a/include/ddk/wdm.h b/include/ddk/wdm.h
index b0ad0e70d34..c1d083ef01a 100644
--- a/include/ddk/wdm.h
+++ b/include/ddk/wdm.h
@@ -1686,6 +1686,7 @@ BOOLEAN   WINAPI KeCancelTimer(KTIMER*);
 void      WINAPI KeClearEvent(PRKEVENT);
 NTSTATUS  WINAPI KeDelayExecutionThread(KPROCESSOR_MODE,BOOLEAN,LARGE_INTEGER*);
 void      WINAPI KeEnterCriticalRegion(void);
+ULONG     WINAPI KeGetCurrentProcessorNumber(void);
 PKTHREAD  WINAPI KeGetCurrentThread(void);
 void      WINAPI KeInitializeEvent(PRKEVENT,EVENT_TYPE,BOOLEAN);
 void      WINAPI KeInitializeMutex(PRKMUTEX,ULONG);