diff --git a/flight/Revolution/Makefile.osx b/flight/Revolution/Makefile.osx
index e2c8ea694..a38bced0d 100644
--- a/flight/Revolution/Makefile.osx
+++ b/flight/Revolution/Makefile.osx
@@ -40,9 +40,6 @@ USE_BOOTLOADER ?= NO
 # Set to YES when using Code Sourcery toolchain
 CODE_SOURCERY ?= NO
 
-# Toolchain prefix (i.e arm-elf- -> arm-elf-gcc.exe)
-TCHAIN_PREFIX ?= /usr/local/android-ndk-r5/toolchains/arm-linux-androideabi-4.4.3/prebuilt/darwin-x86/bin/arm-linux-androideabi-
-
 # Remove command is different for Code Sourcery on Windows
 REMOVE_CMD ?= rm