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-rw-r--r--components/canvas/webgl_thread.rs3
1 files changed, 2 insertions, 1 deletions
diff --git a/components/canvas/webgl_thread.rs b/components/canvas/webgl_thread.rs
index 907233a3b89..b4a612103c2 100644
--- a/components/canvas/webgl_thread.rs
+++ b/components/canvas/webgl_thread.rs
@@ -892,7 +892,8 @@ impl WebGLImpl {
gl::STENCIL_VALUE_MASK |
gl::STENCIL_WRITEMASK |
gl::SUBPIXEL_BITS |
- gl::UNPACK_ALIGNMENT =>
+ gl::UNPACK_ALIGNMENT |
+ gl::FRAGMENT_SHADER_DERIVATIVE_HINT =>
//gl::UNPACK_COLORSPACE_CONVERSION_WEBGL =>
Ok(WebGLParameter::Int(gl.get_integer_v(param_id))),