diff --git a/src/ebusd/Makefile.am b/src/ebusd/Makefile.am
index c2a21d74..6041e543 100644
--- a/src/ebusd/Makefile.am
+++ b/src/ebusd/Makefile.am
@@ -19,6 +19,8 @@ ebusd_SOURCES = bushandler.cpp \
 
 if MQTT
 ebusd_SOURCES += mqtthandler.cpp mqtthandler.h
+else
+AM_CXXFLAGS += -Wunused-parameter
 endif
 
 ebusd_LDADD = ../lib/utils/libutils.a \