2 files changed, 11 insertions, 2 deletions

diff --git a/tests/t0107-snapshot.sh b/tests/t0107-snapshot.sh
index 8e90e10..d97c465 100755
--- a/tests/t0107-snapshot.sh
+++ b/tests/t0107-snapshot.sh
@@ -22,5 +22,8 @@ run_test 'strip off the header lines' '
 
 run_test 'verify gzip format' 'gunzip --test trash/test.tar.gz'
-run_test 'untar' 'tar -xf trash/test.tar.gz -C trash'
+run_test 'untar' '
+        rm -rf trash/foo &&
+        tar -xf trash/test.tar.gz -C trash
+'
 
 run_test 'count files' '
diff --git a/ui-snapshot.c b/ui-snapshot.c
index 966a140..7a597ff 100644
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -83,5 +83,11 @@ static int make_snapshot(const struct cgit_snapshot_format *format,
         }
         memset(&args, 0, sizeof(args));
-        args.base = fmt("%s/", prefix);
+        if (prefix) {
+                args.base = fmt("%s/", prefix);
+                args.baselen = strlen(prefix) + 1;
+        } else {
+                args.base = "";
+                args.baselen = 0;
+        }
         args.tree = commit->tree;
         args.time = commit->date;