diff --git a/nptl/tst-pthread_gettid_np.c b/nptl/tst-pthread_gettid_np.c
index 6a98d864e2..ced4291510 100644
--- a/nptl/tst-pthread_gettid_np.c
+++ b/nptl/tst-pthread_gettid_np.c
@@ -20,6 +20,7 @@
 #include <pthread.h>
 #include <sched.h>
 #include <signal.h>
+#include <stdbool.h>
 #include <support/check.h>
 #include <support/xthread.h>
 #include <unistd.h>