diff --git a/Makefile b/Makefile
index 16875e3..ce2196b 100644
--- a/Makefile
+++ b/Makefile
@@ -54,7 +54,7 @@ LIBS		= c gcc hal phy pp net80211 wpa main lwip
 
 # compiler flags using during compilation of source files
 CFLAGS		= -Os -ggdb -std=c99 -Werror -Wpointer-arith -Wundef -Wall -Wl,-EL -fno-inline-functions \
-		-nostdlib -mlongcalls -mtext-section-literals  -D__ets__ -DICACHE_FLASH \
+		-nostdlib -mlongcalls -mtext-section-literals  -D__ets__ -DICACHE_FLASH -D_STDINT_H \
 		-Wno-address
 
 # linker flags used to generate the main object file