diff --git a/compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArguments.kt b/compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArguments.kt
index d1092d2c097..609e9a5f98a 100644
--- a/compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArguments.kt
+++ b/compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArguments.kt
@@ -298,6 +298,11 @@ abstract class CommonCompilerArguments : CommonToolArguments() {
     )
     var checkStickyPhaseConditions: Boolean by FreezableVar(false)
 
+    @GradleDeprecatedOption(
+        message = "Compiler flag -Xuse-k2 is deprecated; please use language version 2.0 instead",
+        level = DeprecationLevel.WARNING,
+        removeAfter = "2.0.0",
+    )
     @GradleOption(
         DefaultValue.BOOLEAN_FALSE_DEFAULT,
         gradleInputType = GradleInputTypes.INPUT,
diff --git a/libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinCommonCompilerOptions.kt b/libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinCommonCompilerOptions.kt
index d8248e4c40d..973a622a641 100644
--- a/libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinCommonCompilerOptions.kt
+++ b/libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinCommonCompilerOptions.kt
@@ -29,6 +29,7 @@ interface KotlinCommonCompilerOptions : org.jetbrains.kotlin.gradle.dsl.KotlinCo
      * Compile using experimental K2. K2 is a new compiler pipeline, no compatibility guarantees are yet provided
      * Default value: false
      */
+    @Deprecated(message = "Compiler flag -Xuse-k2 is deprecated; please use language version 2.0 instead", level = DeprecationLevel.WARNING)
     @get:org.gradle.api.tasks.Input
     val useK2: org.gradle.api.provider.Property<kotlin.Boolean>
 }
diff --git a/libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinCommonOptions.kt b/libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinCommonOptions.kt
index 66fa621f6c3..8d8ac4958e6 100644
--- a/libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinCommonOptions.kt
+++ b/libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinCommonOptions.kt
@@ -38,6 +38,7 @@ interface KotlinCommonOptions : org.jetbrains.kotlin.gradle.dsl.KotlinCommonTool
      * Compile using experimental K2. K2 is a new compiler pipeline, no compatibility guarantees are yet provided
      * Default value: false
      */
+    @Deprecated(message = "Compiler flag -Xuse-k2 is deprecated; please use language version 2.0 instead", level = DeprecationLevel.WARNING)
     var useK2: kotlin.Boolean
         get() = options.useK2.get()
         set(value) = options.useK2.set(value)
diff --git a/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinCommonCompilerOptionsDefault.kt b/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinCommonCompilerOptionsDefault.kt
index 42448f94c8f..b0762dcc9d4 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinCommonCompilerOptionsDefault.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinCommonCompilerOptionsDefault.kt
@@ -15,6 +15,7 @@ internal abstract class KotlinCommonCompilerOptionsDefault @javax.inject.Inject
     override val languageVersion: org.gradle.api.provider.Property<org.jetbrains.kotlin.gradle.dsl.KotlinVersion> =
         objectFactory.property(org.jetbrains.kotlin.gradle.dsl.KotlinVersion::class.java)
 
+    @Deprecated(message = "Compiler flag -Xuse-k2 is deprecated; please use language version 2.0 instead", level = DeprecationLevel.WARNING)
     override val useK2: org.gradle.api.provider.Property<kotlin.Boolean> =
         objectFactory.property(kotlin.Boolean::class.java).convention(false)