diff --git a/Ports/ja2/package.sh b/Ports/ja2/package.sh
index 7ed7ed73246..d2a964168b8 100755
--- a/Ports/ja2/package.sh
+++ b/Ports/ja2/package.sh
@@ -6,7 +6,9 @@ workdir="ja2-stracciatella-${version}"
 files=(
     "https://github.com/ja2-stracciatella/ja2-stracciatella/archive/refs/heads/${version}.zip 178375de4859d16a76276c781455bf48d3fa862841387c8aa6cfa4162f4f0ca4"
 )
-makeopts="SERENITY=1"
+makeopts+=(
+    'SERENITY=1'
+)
 launcher_name="Jagged Alliance 2"
 launcher_category=Games
 launcher_command="/opt/ja2/ja2"