diff --git a/gradle/buildSrc/build.gradle.kts b/gradle/buildSrc/build.gradle.kts
index bdfd32a6..94225f67 100644
--- a/gradle/buildSrc/build.gradle.kts
+++ b/gradle/buildSrc/build.gradle.kts
@@ -19,6 +19,8 @@
  */
 
 plugins {
+    // Use Kotlin for `buildSrc`.
+    // https://kotlinlang.org/docs/reference/using-gradle.html#targeting-the-jvm
     kotlin("jvm").version("1.3.72")
 }