diff --git a/reactos/ntoskrnl/include/internal/ke.h b/reactos/ntoskrnl/include/internal/ke.h
index fa22656e83a..ca17c514122 100644
--- a/reactos/ntoskrnl/include/internal/ke.h
+++ b/reactos/ntoskrnl/include/internal/ke.h
@@ -153,6 +153,7 @@ extern PVOID KeRaiseUserExceptionDispatcher;
 extern UCHAR KiDebugRegisterTrapOffsets[9];
 extern UCHAR KiDebugRegisterContextOffsets[9];
 extern ULONG KeTimeIncrement;
+extern ULONG KeTimeAdjustment;
 extern ULONG_PTR KiBugCheckData[5];
 extern ULONG KiFreezeFlag;
 extern ULONG KiDPCTimeout;