diff --git a/gst/videotestsrc/gstvideotestsrc.h b/gst/videotestsrc/gstvideotestsrc.h
index c0dfaa4199..90388c254c 100644
--- a/gst/videotestsrc/gstvideotestsrc.h
+++ b/gst/videotestsrc/gstvideotestsrc.h
@@ -61,6 +61,8 @@ G_BEGIN_DECLS
  * @GST_VIDEO_TEST_SRC_CHROMA_ZONE_PLATE: Chroma zone plate
  * @GST_VIDEO_TEST_SRC_BALL: Moving ball
  * @GST_VIDEO_TEST_SRC_SMPTE100: SMPTE test pattern (100% color bars)
+ * @GST_VIDEO_TEST_SRC_SOLID: A solid color, defined by the
+ * #GstVideoTestSrc:foreground-color property
  * @GST_VIDEO_TEST_SRC_BAR: Bar with foreground color
  * @GST_VIDEO_TEST_SRC_PINWHEEL: Pinwheel
  * @GST_VIDEO_TEST_SRC_SPOKES: Spokes