diff --git a/src/main/java/dev/latvian/mods/rhino/Context.java b/src/main/java/dev/latvian/mods/rhino/Context.java
index 8837c6b9..6d00670c 100644
--- a/src/main/java/dev/latvian/mods/rhino/Context.java
+++ b/src/main/java/dev/latvian/mods/rhino/Context.java
@@ -1858,13 +1858,15 @@ public String defaultObjectToSource(Scriptable scope, Scriptable thisObj, Object
 	}
 
 	public Object[] insertContextArg(Object[] args) {
-		if (!(args[0] instanceof Context)) {
+		if (args.length == 0) {
+			return new Object[]{this};
+		} else if (!(args[0] instanceof Context)) {
 			Object[] newArgs = new Object[args.length + 1];
 			newArgs[0] = this;
 			System.arraycopy(args, 0, newArgs, 1, args.length);
 			return newArgs;
+		} else {
+			return args;
 		}
-
-		return args;
 	}
 }