diff --git a/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/TLSChannelBuilder.java b/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/TLSChannelBuilder.java
index 673246732..55c89535f 100644
--- a/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/TLSChannelBuilder.java
+++ b/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/TLSChannelBuilder.java
@@ -58,7 +58,7 @@ public class TLSChannelBuilder implements ChannelBuilder<NettyChannelBuilder> {
 
                     if (certFile.isFile() && keyFile.isFile()) {
                         try (InputStream cert = new FileInputStream(certFile);
-                             InputStream key = PrivateKeyUtil.loadDecryptionKey(keyPath)) {
+                             InputStream key = PrivateKeyUtil.loadDecryptionKey(keyFile.getAbsolutePath())) {
                             builder.keyManager(cert, key);
                         }
                     } else if (!certFile.isFile() || !keyFile.isFile()) {