diff --git a/tests/suites/test_suite_ssl.function b/tests/suites/test_suite_ssl.function
index a7efb04..b18ed42 100644
--- a/tests/suites/test_suite_ssl.function
+++ b/tests/suites/test_suite_ssl.function
@@ -8,7 +8,7 @@
 #include <mbedtls/debug.h>
 #include <ssl_tls13_keys.h>
 
-#include <constant_time.h>
+#include <constant_time_internal.h>
 
 #include <test/constant_flow.h>