diff --git a/hscript/Parser.hx b/hscript/Parser.hx
index 3ae5b14..f4f8169 100644
--- a/hscript/Parser.hx
+++ b/hscript/Parser.hx
@@ -1444,7 +1444,7 @@ class Parser {
 			return evalPreproCond(e1) || evalPreproCond(e2);
 		default:
 			error(EInvalidPreprocessor("Can't eval " + expr(e).getName()), readPos, readPos);
-			return null;
+			return false;
 		}
 	}