diff --git a/tasmota/tasmota_configurations.h b/tasmota/tasmota_configurations.h
index 2bb06a2ea..f0d71750e 100644
--- a/tasmota/tasmota_configurations.h
+++ b/tasmota/tasmota_configurations.h
@@ -898,6 +898,7 @@
 #undef USE_PROMETHEUS                            // Disable support for https://prometheus.io/ metrics exporting over HTTP /metrics endpoint
 #undef DEBUG_THEO                                // Disable debug code
 #undef USE_DEBUG_DRIVER                          // Disable debug code
+#undef USE_AC_ZERO_CROSS_DIMMER                  // Disable support for AC_ZERO_CROSS_DIMMER
 
 #endif  // FIRMWARE_MINIMAL
 #endif  // ifndef FIRMWARE_MINICUSTOM