diff --git a/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/KotlinToJVMBytecodeCompiler.kt b/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/KotlinToJVMBytecodeCompiler.kt
index 94f10d97466..ff7eb3d307e 100644
--- a/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/KotlinToJVMBytecodeCompiler.kt
+++ b/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/KotlinToJVMBytecodeCompiler.kt
@@ -37,8 +37,7 @@ import org.jetbrains.kotlin.cli.common.CLIConfigurationKeys
 import org.jetbrains.kotlin.cli.common.checkKotlinPackageUsage
 import org.jetbrains.kotlin.cli.common.config.addKotlinSourceRoot
 import org.jetbrains.kotlin.cli.common.messages.AnalyzerWithCompilerReport
-import org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity.OUTPUT
-import org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity.WARNING
+import org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity.*
 import org.jetbrains.kotlin.cli.common.messages.MessageCollector
 import org.jetbrains.kotlin.cli.common.messages.OutputMessageUtil
 import org.jetbrains.kotlin.cli.common.output.writeAll
@@ -305,6 +304,11 @@ object KotlinToJVMBytecodeCompiler {
         val project = environment.project
         val performanceManager = environment.configuration.get(CLIConfigurationKeys.PERF_MANAGER)
 
+        environment.messageCollector.report(
+            STRONG_WARNING,
+            "ATTENTION!\n This build uses in-dev FIR: \n  -Xuse-fir"
+        )
+
         PsiElementFinder.EP.getPoint(project).unregisterExtension(JavaElementFinder::class.java)
 
         val projectConfiguration = environment.configuration