diff --git a/src/arch/8051/arch.mk b/src/arch/8051/arch.mk
index f31d0cd..826256d 100644
--- a/src/arch/8051/arch.mk
+++ b/src/arch/8051/arch.mk
@@ -1,4 +1,4 @@
-CC=sdcc -mmcs51 --Werror
+CC=sdcc -mmcs51 --model-medium --Werror
 OBJ=$(patsubst src/%.c,$(BUILD)/%.rel,$(SRC))
 
 # Run EC rom in simulator