diff --git a/plugins/obs-x264/obs-x264.c b/plugins/obs-x264/obs-x264.c
index d177a8e4b..8c475a233 100644
--- a/plugins/obs-x264/obs-x264.c
+++ b/plugins/obs-x264/obs-x264.c
@@ -363,7 +363,7 @@ static inline const char *get_x264_colorspace_name(enum video_colorspace cs)
 	switch (cs) {
 	case VIDEO_CS_DEFAULT:
 	case VIDEO_CS_601:
-		return "undef";
+		return "bt470bg";
 	case VIDEO_CS_709:;
 	}