diff --git a/examples/lua_REPL/Makefile b/examples/lua_REPL/Makefile
index 6f1a0ba06815ef3c4d0f6aae06401e5e4bc46f4e..cbdccb97895e2079f749749e977a1d11d429c3e1 100644
--- a/examples/lua_REPL/Makefile
+++ b/examples/lua_REPL/Makefile
@@ -24,7 +24,8 @@ BOARD_INSUFFICIENT_MEMORY := blackpill bluepill calliope-mini cc2650-launchpad \
                              seeeduino_arch-pro sensebox_samd21 slstk3401a \
                              sltb001a slwstk6220a sodaq-autonomo sodaq-explorer \
                              sodaq-one stk3600 stm32f3discovery yunjia-nrf51822 \
-                             esp8266-esp-12x esp8266-olimex-mod esp8266-sparkfun-thing
+                             esp8266-esp-12x esp8266-olimex-mod esp8266-sparkfun-thing \
+                             firefly
 
 BOARD_BLACKLIST := arduino-duemilanove arduino-mega2560 arduino-uno \
                    chronos hifive1 jiminy-mega256rfr2 mega-xplained mips-malta \