diff --git a/tests/header/header_test.cpp b/tests/header/header_test.cpp
index 5c8a02926..591dbf7d7 100644
--- a/tests/header/header_test.cpp
+++ b/tests/header/header_test.cpp
@@ -45,6 +45,7 @@ class TEST_NAME : public util::test_base {
 #define TEST_FAIL
     log.note("SYCL_LANGUAGE_VERSION not present");
 #else
+    static_assert(std::is_same_v<decltype(SYCL_LANGUAGE_VERSION), long>);
     static_assert(SYCL_LANGUAGE_VERSION == 202012L);
 #endif