diff --git a/scalalib/src/mill/scalalib/GenIdeaImpl.scala b/scalalib/src/mill/scalalib/GenIdeaImpl.scala
index f71a7856fd8..b4f77f16bcf 100644
--- a/scalalib/src/mill/scalalib/GenIdeaImpl.scala
+++ b/scalalib/src/mill/scalalib/GenIdeaImpl.scala
@@ -26,6 +26,7 @@ object GenIdea extends ExternalModule {
   implicit def millScoptEvaluatorReads[T] = new mill.main.EvaluatorScopt[T]()
   lazy val millDiscover = Discover[this.type]
 }
+
 object GenIdeaImpl {
 
   def apply(ctx: Log with Home,
@@ -225,8 +226,9 @@ object GenIdeaImpl {
       Tuple2(
         ".idea"/"modules.xml",
         allModulesXmlTemplate(
-          for((path, mod) <- modules)
-            yield moduleName(path)
+          modules
+            .filter(!_._2.skipIdea)
+            .map { case (path, mod) => moduleName(path) }
         )
       ),
       Tuple2(
diff --git a/scalalib/src/mill/scalalib/JavaModule.scala b/scalalib/src/mill/scalalib/JavaModule.scala
index b15e0bdb86d..15fa7264902 100644
--- a/scalalib/src/mill/scalalib/JavaModule.scala
+++ b/scalalib/src/mill/scalalib/JavaModule.scala
@@ -527,6 +527,11 @@ trait JavaModule extends mill.Module with TaskModule { outer =>
   def intellijModulePath: Path = millSourcePath
 
   def forkWorkingDir = T{ ammonite.ops.pwd }
+
+  /**
+   * Skip Idea project file generation.
+   */
+  def skipIdea: Boolean = false
 }
 
 trait TestModule extends JavaModule with TaskModule {