diff --git a/bacnet-stack/src/bacdevobjpropref.c b/bacnet-stack/src/bacdevobjpropref.c
index 46055ba2..eb92a3f7 100644
--- a/bacnet-stack/src/bacdevobjpropref.c
+++ b/bacnet-stack/src/bacdevobjpropref.c
@@ -230,5 +230,5 @@ int main(
     return 0;
 }
 
-#endif // TEST_DEV_ID_PROP_REF
-#endif // TEST
+#endif /* TEST_DEV_ID_PROP_REF */
+#endif /* TEST */
diff --git a/bacnet-stack/src/bacpropstates.c b/bacnet-stack/src/bacpropstates.c
index 543a7a12..49cf07eb 100644
--- a/bacnet-stack/src/bacpropstates.c
+++ b/bacnet-stack/src/bacpropstates.c
@@ -428,5 +428,5 @@ int main(
     return 0;
 }
 
-#endif // TEST_PROP_STATES
-#endif // TEST
+#endif /* TEST_PROP_STATES */
+#endif /* TEST */
diff --git a/bacnet-stack/src/event.c b/bacnet-stack/src/event.c
index 4ae756e1..140e00d8 100644
--- a/bacnet-stack/src/event.c
+++ b/bacnet-stack/src/event.c
@@ -1515,5 +1515,5 @@ int main(
     return 0;
 }
 
-#endif // TEST_EVENT
-#endif // TEST
+#endif /* TEST_EVENT */
+#endif /* TEST */
diff --git a/bacnet-stack/src/timestamp.c b/bacnet-stack/src/timestamp.c
index ee501a88..dea871d6 100644
--- a/bacnet-stack/src/timestamp.c
+++ b/bacnet-stack/src/timestamp.c
@@ -297,5 +297,5 @@ int main(
     return 0;
 }
 
-#endif // TEST_TIME_STAMP
-#endif // TEST
+#endif /* TEST_TIME_STAMP */
+#endif /* TEST */