diff --git a/include/avif/avif.h b/include/avif/avif.h
index b2dc1ec..ff9d1cf 100644
--- a/include/avif/avif.h
+++ b/include/avif/avif.h
@@ -311,8 +311,8 @@
     // This is actually reserved, but libavif uses it as a sentinel value.
     AVIF_COLOR_PRIMARIES_UNKNOWN = 0,
 
-    AVIF_COLOR_PRIMARIES_SRGB = 1,
     AVIF_COLOR_PRIMARIES_BT709 = 1,
+    AVIF_COLOR_PRIMARIES_SRGB = 1,
     AVIF_COLOR_PRIMARIES_IEC61966_2_4 = 1,
     AVIF_COLOR_PRIMARIES_UNSPECIFIED = 2,
     AVIF_COLOR_PRIMARIES_BT470M = 4,