diff --git a/gradle.properties b/gradle.properties
index 7f6aab05147..14537a8d331 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -17,8 +17,7 @@ kotlin.build.publishing.attempts=20
 
 ## The following properties can be added to your local.properties file to customize the build:
 
-# Enable when https://youtrack.jetbrains.com/issue/KT-47520 will be fixed
-kotlin.jvm.target.validation.mode=ignore
+kotlin.jvm.target.validation.mode=error
 
 #attachedIntellijVersion=203 (or any other platform version)