diff --git a/base/src/main/java/io/vproxy/base/selector/wrap/quic/QuicFDs.java b/base/src/main/java/io/vproxy/base/selector/wrap/quic/QuicFDs.java
index ddb3fbc2..bbd72380 100644
--- a/base/src/main/java/io/vproxy/base/selector/wrap/quic/QuicFDs.java
+++ b/base/src/main/java/io/vproxy/base/selector/wrap/quic/QuicFDs.java
@@ -69,11 +69,6 @@ public FDSelector openSelector() {
         throw new UnsupportedOperationException();
     }
 
-    @Override
-    public long currentTimeMillis() {
-        return System.currentTimeMillis();
-    }
-
     @Override
     public boolean isV4V6DualStack() {
         return true;
diff --git a/base/src/main/java/io/vproxy/vfd/jdk/ChannelFDs.java b/base/src/main/java/io/vproxy/vfd/jdk/ChannelFDs.java
index 4988da3f..74500bf8 100644
--- a/base/src/main/java/io/vproxy/vfd/jdk/ChannelFDs.java
+++ b/base/src/main/java/io/vproxy/vfd/jdk/ChannelFDs.java
@@ -38,11 +38,6 @@ public FDSelector openSelector() throws IOException {
         return new ChannelSelector(Selector.open());
     }
 
-    @Override
-    public long currentTimeMillis() {
-        return System.currentTimeMillis();
-    }
-
     @Override
     public boolean isV4V6DualStack() {
         return true;
diff --git a/core/src/main/java/io/vproxy/vswitch/stack/fd/VSwitchFDs.java b/core/src/main/java/io/vproxy/vswitch/stack/fd/VSwitchFDs.java
index cc35a00d..effe291c 100644
--- a/core/src/main/java/io/vproxy/vswitch/stack/fd/VSwitchFDs.java
+++ b/core/src/main/java/io/vproxy/vswitch/stack/fd/VSwitchFDs.java
@@ -29,11 +29,6 @@ public FDSelector openSelector() {
         throw new UnsupportedOperationException("not supported");
     }
 
-    @Override
-    public long currentTimeMillis() {
-        return System.currentTimeMillis();
-    }
-
     @Override
     public boolean isV4V6DualStack() {
         return false;