diff --git a/src/c/alloc_2.d b/src/c/alloc_2.d
index 9b9238016..ff8c35090 100644
--- a/src/c/alloc_2.d
+++ b/src/c/alloc_2.d
@@ -131,6 +131,18 @@ cl_alloc_instance(cl_index slots)
 	return i;
 }
 
+void *
+ecl_alloc_uncollectable(size_t size)
+{
+	return GC_MALLOC_UNCOLLECTABLE(size);
+}
+
+void
+ecl_free_uncollectable(void *pointer)
+{
+	return GC_FREE(pointer);
+}
+
 static void
 init_tm(cl_type t, const char *name, cl_index elsize)
 {
diff --git a/src/h/external.h b/src/h/external.h
index ebd89859b..520c09a3c 100644
--- a/src/h/external.h
+++ b/src/h/external.h
@@ -204,6 +204,8 @@ extern cl_object si_set_hole_size _ARGS((cl_narg narg, cl_object size));
 extern cl_object si_ignore_maximum_pages _ARGS((cl_narg narg, ...));
 extern void *cl_alloc(cl_index n);
 extern void *cl_alloc_align(cl_index size, cl_index align);
+extern void *ecl_alloc_uncollectable(size_t size);
+extern void ecl_free_uncollectable(void *);
 #define cl_alloc_atomic(x) cl_alloc(x)
 #define cl_alloc_atomic_align(x,s) cl_alloc_align(x,s)
 #define ecl_register_static_root(x) ecl_register_root(x);