diff --git a/kyuubi-util-scala/src/main/scala/org/apache/kyuubi/util/command/CommandLineUtils.scala b/kyuubi-util-scala/src/main/scala/org/apache/kyuubi/util/command/CommandLineUtils.scala
index 92ca3a52571..4956779ac81 100644
--- a/kyuubi-util-scala/src/main/scala/org/apache/kyuubi/util/command/CommandLineUtils.scala
+++ b/kyuubi-util-scala/src/main/scala/org/apache/kyuubi/util/command/CommandLineUtils.scala
@@ -19,10 +19,12 @@ package org.apache.kyuubi.util.command
 
 import java.io.File
 
+import scala.util.matching.Regex
+
 object CommandLineUtils {
   val CONF = "--conf"
 
-  val PATTERN_FOR_KEY_VALUE_ARG = "(.+?)=(.+)".r
+  val PATTERN_FOR_KEY_VALUE_ARG: Regex = "(.+?)=(.+)".r
 
   /**
    * The Java command's option name for classpath