diff --git a/components/style/gecko/media_queries.rs b/components/style/gecko/media_queries.rs
index a560211d2f3..b41280d2112 100644
--- a/components/style/gecko/media_queries.rs
+++ b/components/style/gecko/media_queries.rs
@@ -443,7 +443,7 @@ impl Device {
     /// Returns the gtk titlebar radius in CSS pixels.
     pub fn titlebar_radius(&self) -> f32 {
         unsafe {
-            bindings::Gecko_GetLookAndFeelFloat(bindings::LookAndFeel_FloatID::TitlebarRadius as i32)
+            bindings::Gecko_GetLookAndFeelInt(bindings::LookAndFeel_IntID::TitlebarRadius as i32) as f32
         }
     }