diff --git a/xpra/codecs/webp/decoder.pyx b/xpra/codecs/webp/decoder.pyx
index af8dd6427e..fc9363bf73 100644
--- a/xpra/codecs/webp/decoder.pyx
+++ b/xpra/codecs/webp/decoder.pyx
@@ -336,6 +336,7 @@ def decompress_to_yuv(data: bytes, options: typedict, has_alpha=False) -> WebpIm
             show_plane_range("YUV"[i], planes[i], w // xdiv, strides[i], h // ydiv)
 
     img = WebpImageWrapper(0, 0, w, h, planes, "YUV420P", (3+alpha)*8, strides, 3+alpha, ImageWrapper.PLANAR_3+alpha)
+    img.set_full_range(False)
     img.cython_buffer = <uintptr_t> buf
     return img