1 files changed, 1 insertions, 0 deletions
diff --git a/diff.c b/diff.c
index 2dcad1942c..33153787b8 100644
--- a/diff.c
+++ b/diff.c
@@ -1760,6 +1760,7 @@ int diff_setup_done(struct diff_options *options)
 	if (options->output_format & (DIFF_FORMAT_PATCH |
 				      DIFF_FORMAT_NUMSTAT |
 				      DIFF_FORMAT_DIFFSTAT |
+				      DIFF_FORMAT_SUMMARY |
 				      DIFF_FORMAT_CHECKDIFF))
 		options->recursive = 1;
 	/*