diff --git a/etc/kaleidoscope-builder.conf b/etc/kaleidoscope-builder.conf
index ba596ddb..de7e8abb 100644
--- a/etc/kaleidoscope-builder.conf
+++ b/etc/kaleidoscope-builder.conf
@@ -218,7 +218,6 @@ COMPILER_PREFIX="${COMPILER_PREFIX-avr-}"
 : "${AVR_NM:=${COMPILER_PATH}/${COMPILER_PREFIX}nm}"
 : "${AVR_AR:=${COMPILER_PATH}/${COMPILER_PREFIX}ar}"
 : "${AVR_GCC:=${COMPILER_PATH}/${COMPILER_PREFIX}${C_COMPILER_BASENAME}}"
-AVR_GPLUSPLUS="${AVR_GCC:-${COMPILER_PATH}/${COMPILER_PREFIX}${CXX_COMPILER_BASENAME}}"