diff --git a/reactos/include/ndk/rtlfuncs.h b/reactos/include/ndk/rtlfuncs.h
index 594a7aaf4a1..0f30638fe59 100644
--- a/reactos/include/ndk/rtlfuncs.h
+++ b/reactos/include/ndk/rtlfuncs.h
@@ -2497,14 +2497,6 @@ RtlDoesFileExists_U(
     IN PCWSTR FileName
 );
 
-NTSYSAPI
-BOOLEAN
-NTAPI
-RtlDoesFileExists_UstrEx(
-    IN PCUNICODE_STRING FileName,
-    IN BOOLEAN SucceedIfBusy
-);
-
 NTSYSAPI
 ULONG
 NTAPI