diff --git a/bytebeat_compiler.py b/bytebeat_compiler.py
index dab646e..a20c95c 100644
--- a/bytebeat_compiler.py
+++ b/bytebeat_compiler.py
@@ -29,7 +29,10 @@ DEFAULT_PARAMETERS = {
 }
 
 def fetch(name: str):
-	return res if (res := environ.get(name)) else DEFAULT_PARAMETERS[name]
+	res = DEFAULT_PARAMETERS[name]
+	if from_env := environ.get(name):
+		res += from_env
+	return res
 
 def read_file(path: str) -> str:
 	return open(path, "r", encoding="utf-8-sig").read()