diff --git a/llvm/tools/llvm-objcopy/llvm-objcopy.cpp b/llvm/tools/llvm-objcopy/llvm-objcopy.cpp
--- a/llvm/tools/llvm-objcopy/llvm-objcopy.cpp
+++ b/llvm/tools/llvm-objcopy/llvm-objcopy.cpp
@@ -256,9 +256,10 @@
             Filename, static_cast<sys::fs::perms>(Stat.permissions() &
                                                   ~sys::fs::getUmask())))
 #else
+    // Drop umask, S_ISUID and S_ISGID bits.
     if (auto EC = sys::fs::setPermissions(
             FD, static_cast<sys::fs::perms>(Stat.permissions() &
-                                            ~sys::fs::getUmask())))
+                                            ~(sys::fs::getUmask() | 06000))))
 #endif
       return createFileError(Filename, EC);