diff --git a/aegisub/src/osx-run.sh b/aegisub/src/osx-run.sh
index aba07d97f..196c1ef4a 100755
--- a/aegisub/src/osx-run.sh
+++ b/aegisub/src/osx-run.sh
@@ -1,4 +1,7 @@
 #!/bin/sh
+
+set -e
+
 case "$1" in
 	"build")
 		cd ..