diff --git a/tasmota/support_features.ino b/tasmota/support_features.ino
index 206735a15..e186f9aa3 100644
--- a/tasmota/support_features.ino
+++ b/tasmota/support_features.ino
@@ -787,8 +787,9 @@ void ResponseAppendFeatures(void)
 #ifdef USE_SHIFT595
     feature8 |= 0x00080000;  // xdrv_60_shift595.ino
 #endif
-
-//    feature8 |= 0x00100000;
+#if defined(USE_I2C) && defined(USE_DS3231)
+    feature8 |= 0x00100000;  // xsns_33_ds3231.ino
+#endif
 //    feature8 |= 0x00200000;
 //    feature8 |= 0x00400000;
 //    feature8 |= 0x00800000;