diff --git a/esp8266/Makefile b/esp8266/Makefile
index 10f6d7e2d2..7efb0ca50d 100644
--- a/esp8266/Makefile
+++ b/esp8266/Makefile
@@ -8,7 +8,7 @@ include ../py/py.mk
 
 PORT = /dev/ttyACM0
 CROSS_COMPILE = xtensa-lx106-elf-
-ESP_SDK = $(shell $(CC) -print-sysroot)/..
+ESP_SDK = $(shell $(CC) -print-sysroot)/usr
 
 INC =  -I.
 INC += -I$(PY_SRC)