diff --git a/docs/tools/qemu-img.rst b/docs/tools/qemu-img.rst
index 85a6e05b35..15aeddc6d8 100644
--- a/docs/tools/qemu-img.rst
+++ b/docs/tools/qemu-img.rst
@@ -57,7 +57,7 @@ cases. See below for a description of the supported disk formats.
 *OUTPUT_FMT* is the destination format.
 
 *OPTIONS* is a comma separated list of format specific options in a
-name=value format. Use ``-o ?`` for an overview of the options supported
+name=value format. Use ``-o help`` for an overview of the options supported
 by the used format or see the format descriptions below for details.
 
 *SNAPSHOT_PARAM* is param used for internal snapshot, format is
diff --git a/qemu-img.c b/qemu-img.c
index 7d4b33b3da..cab9776f42 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -164,8 +164,8 @@ void help(void)
            "  'output_filename' is the destination disk image filename\n"
            "  'output_fmt' is the destination format\n"
            "  'options' is a comma separated list of format specific options in a\n"
-           "    name=value format. Use -o ? for an overview of the options supported by the\n"
-           "    used format\n"
+           "    name=value format. Use -o help for an overview of the options supported by\n"
+           "    the used format\n"
            "  'snapshot_param' is param used for internal snapshot, format\n"
            "    is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n"
            "    '[ID_OR_NAME]'\n"