diff --git a/build.sbt b/build.sbt
index 6830f8389..9f96c390e 100644
--- a/build.sbt
+++ b/build.sbt
@@ -106,8 +106,14 @@ lazy val lmCore = (project in file("core"))
       ProblemFilters.exclude[ReversedMissingMethodProblem]("sbt.librarymanagement.ModuleDescriptor.moduleSettings"),
       // New methods added to LM API
       ProblemFilters.exclude[ReversedMissingMethodProblem]("sbt.librarymanagement.ModuleDescriptor.extraInputHash"),
-      // New formats for Logger and GlockLock
-      ProblemFilters.exclude[ReversedMissingMethodProblem]("sbt.internal.librarymanagement.formats.*"),
+      // method globalLockIsoString()sjsonnew.IsoString in trait sbt.internal.librarymanagement.formats.GlobalLockFormat is present only in current version
+      // method xsbtiLoggerIsoString()sjsonnew.IsoString in trait sbt.internal.librarymanagement.formats.LoggerFormat is present only in current version
+      // These only fail in Scala 2.11
+      // We're _probably_ ok to add these between sbt 1 RC2 and RC3,
+      // but it's dangerous territory in general
+      // see typesafehub/migration-manager#183 for an example of what happens..
+      ProblemFilters.exclude[ReversedMissingMethodProblem]("sbt.internal.librarymanagement.formats.GlobalLockFormat.globalLockIsoString"),
+      ProblemFilters.exclude[ReversedMissingMethodProblem]("sbt.internal.librarymanagement.formats.LoggerFormat.xsbtiLoggerIsoString"),
     )
   )
   .configure(addSbtIO, addSbtUtilLogging, addSbtUtilPosition, addSbtUtilCache)