diff --git a/utils/ap51-flash/Makefile b/utils/ap51-flash/Makefile
index ad52f74ae..57d681477 100644
--- a/utils/ap51-flash/Makefile
+++ b/utils/ap51-flash/Makefile
@@ -27,7 +27,7 @@ define Package/ap51-flash
   URL:=http://dev.cloudtrax.com/wiki/ap51-flash-station
 endef
 
-TARGET_EXTRA_CFLAGS:=-DFLASH_FROM_FILE -D_GNU_SOURCE
+TARGET_EXTRA_CFLAGS:=-D_GNU_SOURCE
 
 # pass optimization flags
 MAKE_FLAGS += \