diff --git a/core/shared/src/main/scala/coursier/core/ResolutionProcess.scala b/core/shared/src/main/scala/coursier/core/ResolutionProcess.scala
index 2e2657abc..3de4f6e56 100644
--- a/core/shared/src/main/scala/coursier/core/ResolutionProcess.scala
+++ b/core/shared/src/main/scala/coursier/core/ResolutionProcess.scala
@@ -128,6 +128,10 @@ final case class Missing(
     cont0(current0)
   }
 
+  @deprecated("Intended for internal use only", "1.0.0-RC7")
+  def uniqueModules: Missing =
+    this
+
 }
 
 final case class Continue(