diff --git a/libcxx/include/__memory_resource/memory_resource.h b/libcxx/include/__memory_resource/memory_resource.h
index 3ed5af0fd8c9..418f36dc9b39 100644
--- a/libcxx/include/__memory_resource/memory_resource.h
+++ b/libcxx/include/__memory_resource/memory_resource.h
@@ -11,6 +11,7 @@
 
 #include <__availability>
 #include <__config>
+#include <__fwd/memory_resource.h>
 #include <cstddef>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
diff --git a/libcxx/include/array b/libcxx/include/array
index e4cd9b9ba5d1..2983b67edb7f 100644
--- a/libcxx/include/array
+++ b/libcxx/include/array
@@ -118,6 +118,7 @@ template <size_t I, class T, size_t N> const T&& get(const array<T, N>&&) noexce
 #include <__algorithm/swap_ranges.h>
 #include <__assert> // all public C++ headers provide the assertion handler
 #include <__config>
+#include <__fwd/array.h>
 #include <__iterator/reverse_iterator.h>
 #include <__tuple/sfinae_helpers.h>
 #include <__type_traits/conditional.h>
diff --git a/libcxx/include/tuple b/libcxx/include/tuple
index 8f01eecd66ac..e138f0af2f85 100644
--- a/libcxx/include/tuple
+++ b/libcxx/include/tuple
@@ -207,6 +207,7 @@ template <class... Types>
 #include <__config>
 #include <__functional/invoke.h>
 #include <__fwd/array.h>
+#include <__fwd/get.h>
 #include <__fwd/tuple.h>
 #include <__memory/allocator_arg_t.h>
 #include <__memory/uses_allocator.h>