diff --git a/components/script/dom/webgl_extensions/extensions.rs b/components/script/dom/webgl_extensions/extensions.rs
index 7e7ccf301e7..92a34bac23e 100644
--- a/components/script/dom/webgl_extensions/extensions.rs
+++ b/components/script/dom/webgl_extensions/extensions.rs
@@ -237,6 +237,7 @@ impl WebGLExtensions {
     }
 
     fn register_all_extensions(&self) {
+        self.register::<ext::oeselementindexuint::OESElementIndexUint>();
         self.register::<ext::oesstandardderivatives::OESStandardDerivatives>();
         self.register::<ext::oestexturefloat::OESTextureFloat>();
         self.register::<ext::oestexturefloatlinear::OESTextureFloatLinear>();