diff --git a/miniz_oxide/build.rs b/miniz_oxide/build.rs
index 937e4e52..e916ace1 100644
--- a/miniz_oxide/build.rs
+++ b/miniz_oxide/build.rs
@@ -1,3 +1,4 @@
+#![forbid(unsafe_code)]
 use autocfg;
 
 fn main() {