diff --git a/exec/testbuild.js b/exec/testbuild.js
index f44d2471ef7841fffc6be7ef64d9255d5036ef8f..c6955e38c0f2753dd38eb4cfb100b69e1dd75894 100755
--- a/exec/testbuild.js
+++ b/exec/testbuild.js
@@ -72,7 +72,7 @@ if(platform=="win32") {
 	cleanup="rmdir /s /q ";
 } else {
 	archive="sbbs_src.tgz";
-	archive_cmd="tar --exclude=*output.txt -exclude=" + exclude_dirs.join(" --exclude=") +
+	archive_cmd="tar --exclude=*output.txt --exclude=" + exclude_dirs.join(" --exclude=") +
 		" --exclude=3rdp/win32.release" +
 		" --exclude-vcs" +
 		" --exclude-vcs-ignores" +