diff --git a/components/style/properties/gecko.mako.rs b/components/style/properties/gecko.mako.rs
index a6263b598d68..d7eaf8eb3c41 100644
--- a/components/style/properties/gecko.mako.rs
+++ b/components/style/properties/gecko.mako.rs
@@ -3333,7 +3333,7 @@ fn static_assert() {
         use gecko_bindings::structs::nsCSSPropertyID::eCSSPropertyExtra_all_properties;
         if self.gecko.mTransitionPropertyCount == 1 &&
             self.gecko.mTransitions[0].mProperty == eCSSPropertyExtra_all_properties &&
-            self.gecko.mTransitions[0].mDuration.max(0.0) + self.gecko.mTransitions[0].mDelay <= 0.0f32 {
+            self.transition_combined_duration_at(0) <= 0.0f32 {
             return false;
         }