diff --git a/src/lib/tvgRender.h b/src/lib/tvgRender.h
index 2fb52e0a..1a8472d0 100644
--- a/src/lib/tvgRender.h
+++ b/src/lib/tvgRender.h
@@ -41,6 +41,7 @@ enum ColorSpace
     ARGB8888,          //The channels are joined in the order: alpha, red, green, blue. Colors are alpha-premultiplied.
     ABGR8888S,         //The channels are joined in the order: alpha, blue, green, red. Colors are un-alpha-premultiplied.
     ARGB8888S,         //The channels are joined in the order: alpha, red, green, blue. Colors are un-alpha-premultiplied.
+    Grayscale8,        //One single channel data.
     Unsupported        //TODO: Change to the default, At the moment, we put it in the last to align with SwCanvas::Colorspace.
 };