diff --git a/tools/unix/generate_symbols.sh b/tools/unix/generate_symbols.sh
index d085904f38..e41c8318f6 100755
--- a/tools/unix/generate_symbols.sh
+++ b/tools/unix/generate_symbols.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-set -e -u
+set -euo pipefail
 
 if ! command -v optipng &> /dev/null
 then