diff --git a/database/builder/makedb.sh b/database/builder/makedb.sh
index 70e9cc9..24b08eb 100755
--- a/database/builder/makedb.sh
+++ b/database/builder/makedb.sh
@@ -1,5 +1,7 @@
 #!/bin/sh
 
+set -e
+
 g++ builder.cpp -o builder -lshp
 
 rm -rf out naturalearth timezone db.zip