1 files changed, 1 insertions, 1 deletions
diff --git a/tests/videogen.c b/tests/videogen.c
index 0a7924301b..626dd0672c 100644
--- a/tests/videogen.c
+++ b/tests/videogen.c
@@ -268,7 +268,7 @@ int main(int argc, char **argv)
     height = h;
 
     for(i=0;i<DEFAULT_NB_PICT;i++) {
-        snprintf(buf, sizeof(buf), "%s%d.pgm", argv[1], i);
+        snprintf(buf, sizeof(buf), "%s%02d.pgm", argv[1], i);
         gen_image(i, w, h);
         pgmyuv_save(buf, w, h, rgb_tab);
     }