diff --git a/Userland/Libraries/LibWeb/Layout/BlockFormattingContext.cpp b/Userland/Libraries/LibWeb/Layout/BlockFormattingContext.cpp
index f28b694833..bf01a9d93c 100644
--- a/Userland/Libraries/LibWeb/Layout/BlockFormattingContext.cpp
+++ b/Userland/Libraries/LibWeb/Layout/BlockFormattingContext.cpp
@@ -642,7 +642,7 @@ void BlockFormattingContext::layout_floating_box(Box const& box, BlockContainer
             }
 
             if (fits_on_line) {
-                auto const previous_rect = border_box_rect_in_ancestor_coordinate_space(previous_box.box, root(), m_state);
+                auto const previous_rect = margin_box_rect_in_ancestor_coordinate_space(previous_box.box, root(), m_state);
                 if (previous_rect.contains_vertically(y_in_root + side_data.y_offset)) {
                     // This box touches another already floating box. Stack after others.
                     offset_from_edge = wanted_offset_from_edge;
@@ -759,7 +759,7 @@ BlockFormattingContext::SpaceUsedByFloats BlockFormattingContext::space_used_by_
         auto const& floating_box = *floating_box_ptr;
         auto const& floating_box_state = m_state.get(floating_box.box);
         // NOTE: The floating box is *not* in the final horizontal position yet, but the size and vertical position is valid.
-        auto rect = border_box_rect_in_ancestor_coordinate_space(floating_box.box, root(), m_state);
+        auto rect = margin_box_rect_in_ancestor_coordinate_space(floating_box.box, root(), m_state);
         if (rect.contains_vertically(y)) {
             space_used_by_floats.left = floating_box.offset_from_edge
                 + floating_box_state.content_width()
@@ -772,7 +772,7 @@ BlockFormattingContext::SpaceUsedByFloats BlockFormattingContext::space_used_by_
         auto const& floating_box = *floating_box_ptr;
         auto const& floating_box_state = m_state.get(floating_box.box);
         // NOTE: The floating box is *not* in the final horizontal position yet, but the size and vertical position is valid.
-        auto rect = border_box_rect_in_ancestor_coordinate_space(floating_box.box, root(), m_state);
+        auto rect = margin_box_rect_in_ancestor_coordinate_space(floating_box.box, root(), m_state);
         if (rect.contains_vertically(y)) {
             space_used_by_floats.right = floating_box.offset_from_edge
                 + floating_box_state.margin_box_left();