diff --git a/dll/ntdll/def/ntdll.spec b/dll/ntdll/def/ntdll.spec
index 62f374c05fb..de23297ea55 100644
--- a/dll/ntdll/def/ntdll.spec
+++ b/dll/ntdll/def/ntdll.spec
@@ -1767,8 +1767,8 @@
 @ cdecl -arch=i386 -ret64 _alldiv(double double)
 @ cdecl -arch=i386 _alldvrm()
 @ cdecl -arch=i386 -ret64 _allmul(double double)
-@ cdecl -arch=i386 -norelay _alloca_probe()
-@ cdecl -version=0x600+ -arch=i386 _alloca_probe_16()
+@ cdecl -arch=i386 -norelay -private _alloca_probe()
+@ cdecl -version=0x600+ -arch=i386 -private _alloca_probe_16()
 @ stub -version=0x600+ -arch=i386 _alloca_probe_8
 @ cdecl -arch=i386 -ret64 _allrem(double double)
 @ cdecl -arch=i386 _allshl()