diff --git a/transport/src/main/java/io/netty/channel/nio/NioEventLoop.java b/transport/src/main/java/io/netty/channel/nio/NioEventLoop.java
index 45cf3770e7..45a4977b3a 100644
--- a/transport/src/main/java/io/netty/channel/nio/NioEventLoop.java
+++ b/transport/src/main/java/io/netty/channel/nio/NioEventLoop.java
@@ -212,7 +212,7 @@ public final class NioEventLoop extends SingleThreadEventLoop {
      */
     public void setIoRatio(int ioRatio) {
         if (ioRatio <= 0 || ioRatio > 100) {
-            throw new IllegalArgumentException("ioRatio: " + ioRatio + " (expected: 0 < ioRatio < 101)");
+            throw new IllegalArgumentException("ioRatio: " + ioRatio + " (expected: 0 < ioRatio <= 100)");
         }
         this.ioRatio = ioRatio;
     }