diff --git a/src/xz/args.c b/src/xz/args.c
index cf0c9a3a..e85d1526 100644
--- a/src/xz/args.c
+++ b/src/xz/args.c
@@ -612,6 +612,9 @@ parse_real(args_info *args, int argc, char **argv)
 
 		case OPT_SINGLE_STREAM:
 			opt_single_stream = true;
+
+			// Since 5.7.1alpha --single-stream implies --keep.
+			opt_keep_original = true;
 			break;
 
 		case OPT_NO_SPARSE:
diff --git a/src/xz/xz.1 b/src/xz/xz.1
index 41a0a48c..803650d3 100644
--- a/src/xz/xz.1
+++ b/src/xz/xz.1
@@ -4,7 +4,7 @@
 .\" Authors: Lasse Collin
 .\"          Jia Tan
 .\"
-.TH XZ 1 "2024-12-30" "Tukaani" "XZ Utils"
+.TH XZ 1 "2025-01-04" "Tukaani" "XZ Utils"
 .
 .SH NAME
 xz, unxz, xzcat, lzma, unlzma, lzcat \- Compress or decompress .xz and .lzma files
@@ -497,6 +497,13 @@ This option has no effect if the operation mode is not
 .B \-\-decompress
 or
 .BR \-\-test .
+.IP ""
+Since
+.B xz
+5.7.1alpha,
+.B \-\-single\-stream
+implies
+.BR \-\-keep .
 .TP
 .B \-\-no\-sparse
 Disable creation of sparse files.