diff --git a/modules/video_filter/logo.c b/modules/video_filter/logo.c
index 95b35f193f7534c45b3f9453f75ca0d99d681060..455fe4836254f53f429f6a5e09d3bf9bb2af74cb 100644
--- a/modules/video_filter/logo.c
+++ b/modules/video_filter/logo.c
@@ -661,6 +661,7 @@ static subpicture_t *Filter( filter_t *p_filter, mtime_t date )
     memset( &fmt, 0, sizeof(video_format_t) );
     fmt.i_chroma = VLC_FOURCC('Y','U','V','A');
     fmt.i_aspect = VOUT_ASPECT_FACTOR;
+    fmt.i_sar_num = fmt.i_sar_den = 1;
     fmt.i_width = fmt.i_visible_width = p_sys->i_width;
     fmt.i_height = fmt.i_visible_height = p_sys->i_height;
     fmt.i_x_offset = fmt.i_y_offset = 0;