diff --git a/hscript/Interp.hx b/hscript/Interp.hx
index a9dc5fe..cc97d1b 100644
--- a/hscript/Interp.hx
+++ b/hscript/Interp.hx
@@ -400,7 +400,7 @@ class Interp {
 				else
 					minParams++;
 			var f = function(args:Array<Dynamic>) {
-				if( args.length != params.length ) {
+				if( ( (args == null) ? 0 : args.length ) != params.length ) {
 					if( args.length < minParams ) {
 						var str = "Invalid number of parameters. Got " + args.length + ", required " + minParams;
 						if( name != null ) str += " for function '" + name+"'";