diff --git a/platform/build-scripts/groovy/org/jetbrains/intellij/build/impl/BuildTasksImpl.groovy b/platform/build-scripts/groovy/org/jetbrains/intellij/build/impl/BuildTasksImpl.groovy
index 5cee63dc8385..eb5c30a236be 100644
--- a/platform/build-scripts/groovy/org/jetbrains/intellij/build/impl/BuildTasksImpl.groovy
+++ b/platform/build-scripts/groovy/org/jetbrains/intellij/build/impl/BuildTasksImpl.groovy
@@ -423,7 +423,9 @@ idea.fatal.error.notification=disabled
     }
 
     checkModules(properties.mavenArtifacts.additionalModules, "productProperties.mavenArtifacts.additionalModules")
-    checkModules(buildContext.proprietaryBuildTools.scrambleTool?.namesOfModulesRequiredToBeScrambled, "ProprietaryBuildTools.scrambleTool.namesOfModulesRequiredToBeScrambled")
+    if (buildContext.productProperties.scrambleMainJar) {
+      checkModules(buildContext.proprietaryBuildTools.scrambleTool?.namesOfModulesRequiredToBeScrambled, "ProprietaryBuildTools.scrambleTool.namesOfModulesRequiredToBeScrambled")
+    }
   }
 
   private void checkProductLayout() {