diff --git a/Userland/Libraries/LibWeb/Layout/FormattingContext.cpp b/Userland/Libraries/LibWeb/Layout/FormattingContext.cpp
index 0f1532d9fb..dfac2822d3 100644
--- a/Userland/Libraries/LibWeb/Layout/FormattingContext.cpp
+++ b/Userland/Libraries/LibWeb/Layout/FormattingContext.cpp
@@ -1183,7 +1183,7 @@ float FormattingContext::calculate_min_content_height(Layout::Box const& box, Av
         auto& root_state = m_state.m_root;
         auto& cache = *root_state.intrinsic_sizes.ensure(&box, [] { return adopt_own(*new LayoutState::IntrinsicSizes); });
         if (available_width.is_definite()) {
-            cache_slot = &cache.min_content_height_with_definite_available_width;
+            cache_slot = &cache.min_content_height_with_definite_available_width.ensure(available_width.to_px());
         } else if (available_width.is_min_content()) {
             cache_slot = &cache.min_content_height_with_min_content_available_width;
         } else if (available_width.is_max_content()) {
@@ -1228,7 +1228,7 @@ float FormattingContext::calculate_max_content_height(Layout::Box const& box, Av
         auto& root_state = m_state.m_root;
         auto& cache = *root_state.intrinsic_sizes.ensure(&box, [] { return adopt_own(*new LayoutState::IntrinsicSizes); });
         if (available_width.is_definite()) {
-            cache_slot = &cache.max_content_height_with_definite_available_width;
+            cache_slot = &cache.max_content_height_with_definite_available_width.ensure(available_width.to_px());
         } else if (available_width.is_min_content()) {
             cache_slot = &cache.max_content_height_with_min_content_available_width;
         } else if (available_width.is_max_content()) {
diff --git a/Userland/Libraries/LibWeb/Layout/LayoutState.h b/Userland/Libraries/LibWeb/Layout/LayoutState.h
index a85eae6e5e..ec1071e390 100644
--- a/Userland/Libraries/LibWeb/Layout/LayoutState.h
+++ b/Userland/Libraries/LibWeb/Layout/LayoutState.h
@@ -162,9 +162,9 @@ struct LayoutState {
         Optional<float> max_content_width;
 
         // NOTE: Since intrinsic heights depend on the amount of available width, we have to cache
-        //       three separate results, depending on the available width at the time of calculation.
-        Optional<float> min_content_height_with_definite_available_width;
-        Optional<float> max_content_height_with_definite_available_width;
+        //       three separate kinds of results, depending on the available width at the time of calculation.
+        HashMap<float, Optional<float>> min_content_height_with_definite_available_width;
+        HashMap<float, Optional<float>> max_content_height_with_definite_available_width;
         Optional<float> min_content_height_with_min_content_available_width;
         Optional<float> max_content_height_with_min_content_available_width;
         Optional<float> min_content_height_with_max_content_available_width;