diff --git a/gst-libs/gst/video/video-color.c b/gst-libs/gst/video/video-color.c
index a68bcedeea..08513c8b7c 100644
--- a/gst-libs/gst/video/video-color.c
+++ b/gst-libs/gst/video/video-color.c
@@ -144,7 +144,7 @@ gst_video_colorimetry_from_string (GstVideoColorimetry * cinfo,
  * Returns: a string representation of @cinfo.
  */
 gchar *
-gst_video_colorimetry_to_string (GstVideoColorimetry * cinfo)
+gst_video_colorimetry_to_string (const GstVideoColorimetry * cinfo)
 {
   gint i;
 
@@ -172,7 +172,8 @@ gst_video_colorimetry_to_string (GstVideoColorimetry * cinfo)
  * information in @info.
  */
 gboolean
-gst_video_colorimetry_matches (GstVideoColorimetry * cinfo, const gchar * color)
+gst_video_colorimetry_matches (const GstVideoColorimetry * cinfo,
+    const gchar * color)
 {
   const ColorimetryInfo *ci;
 
diff --git a/gst-libs/gst/video/video-color.h b/gst-libs/gst/video/video-color.h
index ecee0d3867..6dafdea2a4 100644
--- a/gst-libs/gst/video/video-color.h
+++ b/gst-libs/gst/video/video-color.h
@@ -193,10 +193,10 @@ typedef struct {
 #define GST_VIDEO_COLORIMETRY_SRGB        "sRGB"
 #define GST_VIDEO_COLORIMETRY_BT2020      "bt2020"
 
-gboolean     gst_video_colorimetry_matches     (GstVideoColorimetry *cinfo, const gchar *color);
+gboolean     gst_video_colorimetry_matches     (const GstVideoColorimetry *cinfo, const gchar *color);
 gboolean     gst_video_colorimetry_from_string (GstVideoColorimetry *cinfo, const gchar *color);
-gchar *      gst_video_colorimetry_to_string   (GstVideoColorimetry *cinfo);
-gboolean     gst_video_colorimetry_is_equal (const GstVideoColorimetry *cinfo, const GstVideoColorimetry *other);
+gchar *      gst_video_colorimetry_to_string   (const GstVideoColorimetry *cinfo);
+gboolean     gst_video_colorimetry_is_equal    (const GstVideoColorimetry *cinfo, const GstVideoColorimetry *other);
 
 /* compute offset and scale */
 void         gst_video_color_range_offsets     (GstVideoColorRange range,