diff --git a/ref/makefile b/ref/makefile
index eded036..dc8e654 100644
--- a/ref/makefile
+++ b/ref/makefile
@@ -3,6 +3,7 @@
 all: bin/uxn
 
 run: all
+	@ wc -c bin/uxn
 	@ bin/uxn test.bin "Text from arg"
 test:
 	@ bin/uxn opc-test.bin
@@ -13,4 +14,4 @@ clean:
 
 bin/uxn: uxn.c
 	@ mkdir -p bin/
-	@ cc uxn.c -o bin/uxn
+	@ cc -std=c89 -Os -DNDEBUG -g0 -s -Wno-unknown-pragmas uxn.c -o bin/uxn