diff --git a/zip/zip.go b/zip/zip.go
index 774966a..1f5fe43 100644
--- a/zip/zip.go
+++ b/zip/zip.go
@@ -317,7 +317,7 @@
 					Err:  os.ErrNotExist,
 				}
 				if args.IgnoreMissingFiles {
-					fmt.Fprintln(args.Stderr, "warning:", err)
+					fmt.Fprintln(z.stderr, "warning:", err)
 				} else {
 					return err
 				}
@@ -334,7 +334,7 @@
 					Err:  os.ErrNotExist,
 				}
 				if args.IgnoreMissingFiles {
-					fmt.Fprintln(args.Stderr, "warning:", err)
+					fmt.Fprintln(z.stderr, "warning:", err)
 				} else {
 					return err
 				}
@@ -345,7 +345,7 @@
 					Err:  syscall.ENOTDIR,
 				}
 				if args.IgnoreMissingFiles {
-					fmt.Fprintln(args.Stderr, "warning:", err)
+					fmt.Fprintln(z.stderr, "warning:", err)
 				} else {
 					return err
 				}