diff --git a/build.sh b/build.sh
index 8b5d21c..1cd2476 100644
--- a/build.sh
+++ b/build.sh
@@ -1 +1,2 @@
+#!/bin/sh
 gcc -Wall -m64 -o patch-installer lib/miniz/miniz.c src/*.c src/*/*.c && chmod +x patch-installer