diff --git a/src/platforms/jeff/Makefile.inc b/src/platforms/jeff/Makefile.inc
index 81594441..6920ad46 100644
--- a/src/platforms/jeff/Makefile.inc
+++ b/src/platforms/jeff/Makefile.inc
@@ -3,6 +3,7 @@ CC = $(CROSS_COMPILE)gcc
 OBJCOPY = $(CROSS_COMPILE)objcopy
 
 NO_OWN_LL = 1
+OPT_FLAGS := -Os
 
 ifeq ($(ENABLE_DEBUG), 1)
 CFLAGS += -DDEBUG_ME