diff --git a/src/core/org/luaj/vm2/lib/LibFunction.java b/src/core/org/luaj/vm2/lib/LibFunction.java
index b537dab4..5a654170 100644
--- a/src/core/org/luaj/vm2/lib/LibFunction.java
+++ b/src/core/org/luaj/vm2/lib/LibFunction.java
@@ -196,7 +196,7 @@ abstract public class LibFunction extends LuaFunction {
 	}
 
 	public LuaValue call() {
-		return argerror(1,"value");
+		return argerror(1,"value expected");
 	}
 	public LuaValue call(LuaValue a) {
 		return call();