--- a/gfx/webrender_bindings/src/bindings.rs
+++ b/gfx/webrender_bindings/src/bindings.rs
@@ -915,17 +915,17 @@ pub extern "C" fn wr_dp_push_stacking_co
                                               filter_count: usize) {
     assert!(unsafe { !is_in_render_thread() });
 
     let bounds = bounds.into();
 
     let c_filters = make_slice(filters, filter_count);
     let mut filters : Vec<FilterOp> = c_filters.iter().map(|c_filter| {
         match c_filter.filter_type {
-            WrFilterOpType::Blur => FilterOp::Blur(Au::from_f32_px(c_filter.argument)),
+            WrFilterOpType::Blur => FilterOp::Blur(c_filter.argument),
             WrFilterOpType::Brightness => FilterOp::Brightness(c_filter.argument),
             WrFilterOpType::Contrast => FilterOp::Contrast(c_filter.argument),
             WrFilterOpType::Grayscale => FilterOp::Grayscale(c_filter.argument),
             WrFilterOpType::HueRotate => FilterOp::HueRotate(c_filter.argument),
             WrFilterOpType::Invert => FilterOp::Invert(c_filter.argument),
             WrFilterOpType::Opacity => FilterOp::Opacity(PropertyBinding::Value(c_filter.argument)),
             WrFilterOpType::Saturate => FilterOp::Saturate(c_filter.argument),
             WrFilterOpType::Sepia => FilterOp::Sepia(c_filter.argument),