diff --git a/Userland/Libraries/LibWeb/Layout/InlineFormattingContext.cpp b/Userland/Libraries/LibWeb/Layout/InlineFormattingContext.cpp
index 9ff6e190dd..52ac009543 100644
--- a/Userland/Libraries/LibWeb/Layout/InlineFormattingContext.cpp
+++ b/Userland/Libraries/LibWeb/Layout/InlineFormattingContext.cpp
@@ -48,7 +48,7 @@ InlineFormattingContext::AvailableSpaceForLineInfo InlineFormattingContext::avai
 
     for (ssize_t i = bfc.left_side_floats().boxes.size() - 1; i >= 0; --i) {
         auto const& floating_box = bfc.left_side_floats().boxes.at(i);
-        auto rect = margin_box_rect(floating_box, m_state);
+        auto rect = margin_box_rect_in_ancestor_coordinate_space(floating_box, parent().root(), m_state);
         if (rect.contains_vertically(y_in_root)) {
             info.left = rect.right() + 1;
             break;
@@ -59,7 +59,7 @@ InlineFormattingContext::AvailableSpaceForLineInfo InlineFormattingContext::avai
 
     for (ssize_t i = bfc.right_side_floats().boxes.size() - 1; i >= 0; --i) {
         auto const& floating_box = bfc.right_side_floats().boxes.at(i);
-        auto rect = margin_box_rect(floating_box, m_state);
+        auto rect = margin_box_rect_in_ancestor_coordinate_space(floating_box, parent().root(), m_state);
         if (rect.contains_vertically(y_in_root)) {
             info.right = rect.left() - 1;
             break;