1 files changed, 2 insertions, 1 deletions
diff --git a/components/layout/flex.rs b/components/layout/flex.rs
index 14e02aa6fb2..dbfe7840ff5 100644
--- a/components/layout/flex.rs
+++ b/components/layout/flex.rs
@@ -10,6 +10,7 @@ use app_units::{Au, MAX_AU};
 use block::{AbsoluteAssignBSizesTraversal, BlockFlow, MarginsMayCollapseFlag};
 use context::LayoutContext;
 use display_list_builder::{DisplayListBuildState, FlexFlowDisplayListBuilding};
+use display_list_builder::StackingContextCollectionState;
 use euclid::Point2D;
 use floats::FloatKind;
 use flow;
@@ -988,7 +989,7 @@ impl Flow for FlexFlow {
         self.build_display_list_for_flex(state);
     }
 
-    fn collect_stacking_contexts(&mut self, state: &mut DisplayListBuildState) {
+    fn collect_stacking_contexts(&mut self, state: &mut StackingContextCollectionState) {
         self.block_flow.collect_stacking_contexts(state);
     }