diff --git a/netutils/mqttc/Kconfig b/netutils/mqttc/Kconfig
index d17d19480..de2001e19 100644
--- a/netutils/mqttc/Kconfig
+++ b/netutils/mqttc/Kconfig
@@ -13,6 +13,6 @@ if NETUTILS_MQTTC
 
 config NETUTILS_MQTTC_VERSION
 	string "MQTT-C Version"
-	default "1.1.4"
+	default "1.1.5"
 
 endif
diff --git a/netutils/mqttc/Make.defs b/netutils/mqttc/Make.defs
index 878961a03..155950aec 100644
--- a/netutils/mqttc/Make.defs
+++ b/netutils/mqttc/Make.defs
@@ -21,9 +21,6 @@
 ifneq ($(CONFIG_NETUTILS_MQTTC),)
 CONFIGURED_APPS += $(APPDIR)/netutils/mqttc
 
-CFLAGS   += -D__unix__
-CXXFLAGS += -D__unix__
-
 CFLAGS += ${shell $(INCDIR) $(INCDIROPT) "$(CC)" \
 	$(APPDIR)/netutils/mqttc/MQTT-C/include}
 CXXFLAGS += ${shell $(INCDIR) $(INCDIROPT) "$(CC)" \