diff --git a/lib/isc/tests/atomic_test.c b/lib/isc/tests/atomic_test.c
index 9bb6cc943b..361c3b18d8 100644
--- a/lib/isc/tests/atomic_test.c
+++ b/lib/isc/tests/atomic_test.c
@@ -15,6 +15,7 @@
 #include <atf-c.h>
 
 #include <isc/atomic.h>
+#include <isc/print.h>
 #include <isc/result.h>
 
 #include "isctest.h"
diff --git a/lib/isc/tests/task_test.c b/lib/isc/tests/task_test.c
index c742dc3839..7da64f2ebe 100644
--- a/lib/isc/tests/task_test.c
+++ b/lib/isc/tests/task_test.c
@@ -24,6 +24,7 @@
 #include <isc/condition.h>
 #include <isc/mem.h>
 #include <isc/platform.h>
+#include <isc/print.h>
 #include <isc/task.h>
 #include <isc/time.h>
 #include <isc/timer.h>
diff --git a/lib/isc/tests/timer_test.c b/lib/isc/tests/timer_test.c
index 0355ab9ae3..e360419b58 100644
--- a/lib/isc/tests/timer_test.c
+++ b/lib/isc/tests/timer_test.c
@@ -20,6 +20,7 @@
 #include <isc/condition.h>
 #include <isc/mem.h>
 #include <isc/platform.h>
+#include <isc/print.h>
 #include <isc/task.h>
 #include <isc/time.h>
 #include <isc/timer.h>