1 files changed, 1 insertions, 1 deletions
diff --git a/build.sbt b/build.sbt
index 3b3c41b8..e6290b05 100644
--- a/build.sbt
+++ b/build.sbt
@@ -61,7 +61,7 @@ lazy val firrtlSettings = Seq(
 )
 
 lazy val mimaSettings = Seq(
-  mimaPreviousArtifacts := Set()
+  mimaPreviousArtifacts := Set("edu.berkeley.cs" %% "firrtl" % "1.6.0-RC2")
 )
 
 lazy val protobufSettings = Seq(