diff --git a/platform/build-scripts/groovy/org/jetbrains/intellij/build/impl/CompilationTasksImpl.groovy b/platform/build-scripts/groovy/org/jetbrains/intellij/build/impl/CompilationTasksImpl.groovy
index 81050a164483..8995de6c7476 100644
--- a/platform/build-scripts/groovy/org/jetbrains/intellij/build/impl/CompilationTasksImpl.groovy
+++ b/platform/build-scripts/groovy/org/jetbrains/intellij/build/impl/CompilationTasksImpl.groovy
@@ -42,7 +42,6 @@ class CompilationTasksImpl extends CompilationTasks {
 
     ensureKotlinCompilerAddedToClassPath()
 
-    context.projectBuilder.cleanOutput()
     context.messages.progress("Compiling project")
     try {
       if (moduleNames == null) {