diff --git a/testsuites/libtests/block08/init.c b/testsuites/libtests/block08/init.c
index 426138fd38..84e755fc53 100644
--- a/testsuites/libtests/block08/init.c
+++ b/testsuites/libtests/block08/init.c
@@ -24,6 +24,8 @@
 
 #include "bdbuf_tests.h"
 
+#include <stdlib.h> /* for exit */
+
 const char rtems_test_name[] = "BLOCK 8";
 
 rtems_task Init(rtems_task_argument argument)
diff --git a/testsuites/libtests/block09/init.c b/testsuites/libtests/block09/init.c
index 6d156ce24a..2d7cc7aec7 100644
--- a/testsuites/libtests/block09/init.c
+++ b/testsuites/libtests/block09/init.c
@@ -26,6 +26,7 @@
 
 #include <assert.h>
 #include <errno.h>
+#include <stdlib.h>
 
 #include <rtems.h>
 #include <rtems/bdbuf.h>
diff --git a/testsuites/libtests/block10/init.c b/testsuites/libtests/block10/init.c
index 61889abcb1..fac6781d1a 100644
--- a/testsuites/libtests/block10/init.c
+++ b/testsuites/libtests/block10/init.c
@@ -25,6 +25,7 @@
 
 #include <assert.h>
 #include <errno.h>
+#include <stdlib.h>
 
 #include <rtems.h>
 #include <rtems/bdbuf.h>