diff --git a/hw/bsp/gr_citrus/board.mk b/hw/bsp/gr_citrus/board.mk
index 39aef2e9f..062621846 100644
--- a/hw/bsp/gr_citrus/board.mk
+++ b/hw/bsp/gr_citrus/board.mk
@@ -2,6 +2,7 @@ CFLAGS += \
   -nostartfiles \
   -ffunction-sections \
   -fdata-sections \
+  -fshort-enums \
   -mcpu=rx610 \
   -misa=v1 \
   -mlittle-endian-data \