1 files changed, 6 insertions, 0 deletions
diff --git a/diff.c b/diff.c
index 381cc8d4f..240401b73 100644
--- a/diff.c
+++ b/diff.c
@@ -2628,6 +2628,12 @@ int diff_setup_done(struct diff_options *options)
 	 */
 	if (options->pickaxe)
 		DIFF_OPT_SET(options, RECURSIVE);
+	/*
+	 * When patches are generated, submodules diffed against the work tree
+	 * must be checked for dirtiness too so it can be shown in the output
+	 */
+	if (options->output_format & DIFF_FORMAT_PATCH)
+		DIFF_OPT_SET(options, DIRTY_SUBMODULES);
 
 	if (options->detect_rename && options->rename_limit < 0)
 		options->rename_limit = diff_rename_limit_default;