diff --git a/engine/runtime/src/main/scala/org/enso/compiler/core/IR.scala b/engine/runtime/src/main/scala/org/enso/compiler/core/IR.scala
index 5fb7d840c0a..ecc254a5c85 100644
--- a/engine/runtime/src/main/scala/org/enso/compiler/core/IR.scala
+++ b/engine/runtime/src/main/scala/org/enso/compiler/core/IR.scala
@@ -298,6 +298,9 @@ object IR {
     * @param passData the pass metadata associated with this node
     * @param diagnostics compiler diagnostics for this node
     */
+  @SerialVersionUID(
+    3692L
+  ) // prevents reading broken caches, see PR-3692 for details
   sealed case class Module(
     imports: List[Module.Scope.Import],
     exports: List[Module.Scope.Export],