diff --git a/tests/src/external_timing/timing_alt.h b/tests/src/external_timing/timing_alt.h
index 204dbe8632..82e8c8b3d5 100644
--- a/tests/src/external_timing/timing_alt.h
+++ b/tests/src/external_timing/timing_alt.h
@@ -127,4 +127,4 @@ int mbedtls_timing_get_delay(void *data);
 #ifdef __cplusplus
 }
 
-#endif /* FAKE_EXTERNAL_RNG_FOR_TEST_H */
+#endif /* EXTERNAL_TIMING_FOR_TEST_H */