diff --git a/nac3standalone/demo/run_demo.sh b/nac3standalone/demo/run_demo.sh
index 77d6dec..d0f03db 100755
--- a/nac3standalone/demo/run_demo.sh
+++ b/nac3standalone/demo/run_demo.sh
@@ -7,6 +7,7 @@ if [ -z "$1" ]; then
     exit 1
 fi
 
+rm -f *.o
 ../../target/release/nac3standalone $1
 clang -Wall -O2 -o $1.elf demo.c module*.o
 ./$1.elf