diff --git a/phnt/include/ntrtl.h b/phnt/include/ntrtl.h
index 7ee7d6e5149d..c779fffe71ee 100644
--- a/phnt/include/ntrtl.h
+++ b/phnt/include/ntrtl.h
@@ -6053,6 +6053,8 @@ RtlLoadString(
 
 // Errors
 
+_When_(Status < 0, _Out_range_(>, 0))
+_When_(Status >= 0, _Out_range_(==, 0))
 NTSYSAPI
 ULONG
 NTAPI