diff --git a/libgomp/allocator.c b/libgomp/allocator.c
index dce600f5bd7..deebb6a79fa 100644
--- a/libgomp/allocator.c
+++ b/libgomp/allocator.c
@@ -82,7 +82,7 @@ omp_init_allocator (omp_memspace_handle_t memspace, int ntraits,
 	    break;
 	  case omp_atv_contended:
 	  case omp_atv_uncontended:
-	  case omp_atv_sequential:
+	  case omp_atv_serialized:
 	  case omp_atv_private:
 	    data.sync_hint = traits[i].value;
 	    break;
diff --git a/libgomp/omp.h.in b/libgomp/omp.h.in
index e0177dca6fb..6b9ac96cff6 100644
--- a/libgomp/omp.h.in
+++ b/libgomp/omp.h.in
@@ -157,7 +157,7 @@ typedef enum omp_alloctrait_value_t
   omp_atv_contended = 3,
   omp_atv_uncontended = 4,
   omp_atv_serialized = 5,
-  omp_atv_sequential = omp_atv_serialized,
+  omp_atv_sequential __GOMP_DEPRECATED_5_1 = omp_atv_serialized,
   omp_atv_private = 6,
   omp_atv_all = 7,
   omp_atv_thread = 8,
diff --git a/libgomp/omp_lib.f90.in b/libgomp/omp_lib.f90.in
index 973b87be80a..e870755891c 100644
--- a/libgomp/omp_lib.f90.in
+++ b/libgomp/omp_lib.f90.in
@@ -840,7 +840,7 @@
 #endif
 
 #if _OPENMP >= 202011
-!GCC$ ATTRIBUTES DEPRECATED :: omp_proc_bind_master
+!GCC$ ATTRIBUTES DEPRECATED :: omp_proc_bind_master, omp_atv_sequential
 #endif
 
       end module omp_lib
diff --git a/libgomp/testsuite/libgomp.c-c++-common/alloc-10.c b/libgomp/testsuite/libgomp.c-c++-common/alloc-10.c
new file mode 100644
index 00000000000..01ae150dd87
--- /dev/null
+++ b/libgomp/testsuite/libgomp.c-c++-common/alloc-10.c
@@ -0,0 +1,25 @@
+#include <omp.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+const omp_alloctrait_t traits[]
+= { { omp_atk_alignment, 64 },
+    { omp_atk_sync_hint, omp_atv_serialized },
+    { omp_atk_fallback, omp_atv_null_fb } };
+
+int
+main ()
+{
+  omp_allocator_handle_t a;
+  int *volatile p;
+  a = omp_init_allocator (omp_default_mem_space, 3, traits);
+  if (a == omp_null_allocator)
+    abort ();
+  p = (int *) omp_alloc (3072, a);
+  if ((((uintptr_t) p) % 64) != 0)
+    abort ();
+  p[0] = 1;
+  p[3071 / sizeof (int)] = 2;
+  omp_free (p, a);
+  omp_destroy_allocator (a);
+}
diff --git a/libgomp/testsuite/libgomp.fortran/alloc-12.f90 b/libgomp/testsuite/libgomp.fortran/alloc-12.f90
new file mode 100644
index 00000000000..3d10959a018
--- /dev/null
+++ b/libgomp/testsuite/libgomp.fortran/alloc-12.f90
@@ -0,0 +1,28 @@
+! { dg-additional-options "-Wall -Wextra" }
+program main
+  use omp_lib
+  use ISO_C_Binding
+  implicit none (external, type)
+  type(c_ptr) :: p
+  integer, pointer, contiguous :: ip(:)
+  type (omp_alloctrait) :: traits(3)
+  integer (omp_allocator_handle_kind) :: a
+  integer (c_ptrdiff_t) :: iptr
+
+  traits = [omp_alloctrait (omp_atk_alignment, 64), &
+            omp_alloctrait (omp_atk_fallback, omp_atv_null_fb), &
+            omp_alloctrait (omp_atk_sync_hint, omp_atv_serialized)]
+  a = omp_init_allocator (omp_default_mem_space, 3, traits)
+  if (a == omp_null_allocator) stop 1
+
+  p = omp_alloc (3 * c_sizeof (0), a)
+  if (.not. c_associated (p)) stop 2
+  call c_f_pointer (p, ip, [3])
+  if (mod (TRANSFER (p, iptr), 64) /= 0) &
+    stop 3
+  ip(1) = 1
+  ip(2) = 2
+  ip(3) = 3
+  call omp_free (p, a)
+  call omp_destroy_allocator (a)
+end program main