diff --git a/test/vtable/vtable.cpp b/test/vtable/vtable.cpp
index 5ed38b8..abb27d6 100644
--- a/test/vtable/vtable.cpp
+++ b/test/vtable/vtable.cpp
@@ -24,7 +24,7 @@
     sdbusplus::vtable::property("7", "8", &test_get,
                                 sdbusplus::vtable::property_::const_),
     sdbusplus::vtable::property("10", "11", &test_get, &test_set),
-    sdbusplus::vtable::property_o("14", "15", 16),
+    sdbusplus::vtable::property_o("14", "15", &test_get, 16),
     sdbusplus::vtable::end()};
 
 TEST(VtableTest, SameSize)
diff --git a/test/vtable/vtable_c.c b/test/vtable/vtable_c.c
index 105409f..686833b 100644
--- a/test/vtable/vtable_c.c
+++ b/test/vtable/vtable_c.c
@@ -44,7 +44,7 @@
     SD_BUS_SIGNAL("5", "6", 0),
     SD_BUS_PROPERTY("7", "8", &test_get, 0, SD_BUS_VTABLE_PROPERTY_CONST),
     SD_BUS_WRITABLE_PROPERTY("10", "11", &test_get, &test_set, 0, 0),
-    SD_BUS_PROPERTY("14", "15", NULL, 16, 0),
+    SD_BUS_PROPERTY("14", "15", &test_get, 16, 0),
     SD_BUS_VTABLE_END,
 };