diff --git a/include/jemalloc/jemalloc_mangle.sh b/include/jemalloc/jemalloc_mangle.sh
index df328b78..c675bb46 100755
--- a/include/jemalloc/jemalloc_mangle.sh
+++ b/include/jemalloc/jemalloc_mangle.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/sh -eu
 
 public_symbols_txt=$1
 symbol_prefix=$2