diff --git a/hscript/Expr.hx b/hscript/Expr.hx
index b7c4520..d6d81d8 100644
--- a/hscript/Expr.hx
+++ b/hscript/Expr.hx
@@ -112,6 +112,7 @@ enum Error {
 	EInvalidIterator( v : String );
 	EInvalidOp( op : String );
 	EInvalidAccess( f : String );
+	ECustom( msg : String );
 }
 
 
diff --git a/hscript/Printer.hx b/hscript/Printer.hx
index fd04bbf..7b776c4 100644
--- a/hscript/Printer.hx
+++ b/hscript/Printer.hx
@@ -317,7 +317,8 @@ class Printer {
 			case EUnknownVariable(v): "Unknown variable: "+v;
 			case EInvalidIterator(v): "Invalid iterator: "+v;
 			case EInvalidOp(op): "Invalid operator: "+op;
-			case EInvalidAccess(f): "Invalid access to field "+f;
+			case EInvalidAccess(f): "Invalid access to field " + f;
+			case ECustom(msg): msg;
 		};
 		#if hscriptPos
 		return e.origin + ":" + e.line + ": " + message;