diff --git a/transport-native-epoll/src/main/c/io_netty_channel_epoll_Native.c b/transport-native-epoll/src/main/c/io_netty_channel_epoll_Native.c
index bef1cedc89..3e14d27e7d 100644
--- a/transport-native-epoll/src/main/c/io_netty_channel_epoll_Native.c
+++ b/transport-native-epoll/src/main/c/io_netty_channel_epoll_Native.c
@@ -761,8 +761,6 @@ JNIEXPORT jlong JNICALL Java_io_netty_channel_epoll_Native_writev(JNIEnv * env,
         }
 
         w += res;
-        offset += loop;
-        length -= loop;
 
         // update the position of the written buffers
         int written = res;
@@ -791,6 +789,8 @@ JNIEXPORT jlong JNICALL Java_io_netty_channel_epoll_Native_writev(JNIEnv * env,
             }
 
         }
+        offset += loop;
+        length -= loop;
     }
     return w;
 }