1 files changed, 6 insertions, 1 deletions
diff --git a/components/script/dom/webgl_extensions/ext/oesstandardderivatives.rs b/components/script/dom/webgl_extensions/ext/oesstandardderivatives.rs
index 6ede450e621..70de0f0dada 100644
--- a/components/script/dom/webgl_extensions/ext/oesstandardderivatives.rs
+++ b/components/script/dom/webgl_extensions/ext/oesstandardderivatives.rs
@@ -2,13 +2,14 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+use canvas_traits::webgl::WebGLVersion;
 use dom::bindings::codegen::Bindings::OESStandardDerivativesBinding;
 use dom::bindings::codegen::Bindings::OESStandardDerivativesBinding::OESStandardDerivativesConstants;
 use dom::bindings::reflector::{DomObject, Reflector, reflect_dom_object};
 use dom::bindings::root::DomRoot;
 use dom::webglrenderingcontext::WebGLRenderingContext;
 use dom_struct::dom_struct;
-use super::{WebGLExtension, WebGLExtensions};
+use super::{WebGLExtension, WebGLExtensions, WebGLExtensionSpec};
 
 #[dom_struct]
 pub struct OESStandardDerivatives {
@@ -31,6 +32,10 @@ impl WebGLExtension for OESStandardDerivatives {
                            OESStandardDerivativesBinding::Wrap)
     }
 
+    fn spec() -> WebGLExtensionSpec {
+        WebGLExtensionSpec::Specific(WebGLVersion::WebGL1)
+    }
+
     fn is_supported(ext: &WebGLExtensions) -> bool {
         if cfg!(any(target_os = "android", target_os = "ios")) {
             return ext.supports_any_gl_extension(&["GL_OES_standard_derivatives"]);