diff --git a/src/lib/tvgShape.cpp b/src/lib/tvgShape.cpp
index 3d12698f..ab07ed65 100644
--- a/src/lib/tvgShape.cpp
+++ b/src/lib/tvgShape.cpp
@@ -242,6 +242,7 @@ Result Shape::appendRect(float x, float y, float w, float h, float rx, float ry)
 }
 
 
+//TODO: kill alpha at TVG 1.0, because we also have opacity
 Result Shape::fill(uint8_t r, uint8_t g, uint8_t b, uint8_t a) noexcept
 {
     pImpl->rs.color[0] = r;