diff --git a/support/support_set_small_thread_stack_size.c b/support/support_set_small_thread_stack_size.c
index 23189fd..c4f8fea 100644
--- a/support/support_set_small_thread_stack_size.c
+++ b/support/support_set_small_thread_stack_size.c
@@ -16,6 +16,7 @@
License along with the GNU C Library; if not, see
. */
+#include
#include
#include
#include