diff --git a/pkgs/development/interpreters/xulrunner/wrapper/builder.sh b/pkgs/development/interpreters/xulrunner/wrapper/builder.sh
index 20bd86e3eac..4deed9e7a7f 100644
--- a/pkgs/development/interpreters/xulrunner/wrapper/builder.sh
+++ b/pkgs/development/interpreters/xulrunner/wrapper/builder.sh
@@ -15,7 +15,7 @@ fi
 
 cat > $wrapper <<EOF
 #! $SHELL -e
-$runner $appfile "\$@"
+exec $runner $appfile "\$@"
 EOF
 
 chmod +x $wrapper