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-rw-r--r--src/main/scala/firrtl/transforms/TopWiring.scala2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/scala/firrtl/transforms/TopWiring.scala b/src/main/scala/firrtl/transforms/TopWiring.scala
index 9f78848b..80572b30 100644
--- a/src/main/scala/firrtl/transforms/TopWiring.scala
+++ b/src/main/scala/firrtl/transforms/TopWiring.scala
@@ -150,7 +150,7 @@ class TopWiringTransform extends Transform {
sourcemods.get(module).map( _.map { case (a,b,c,path,p) => (a,b,c, inst +: path, p)})
}.flatten
if (seqChildren.nonEmpty) {
- sourcemods(mod.name) = seqChildren
+ sourcemods(mod.name) = sourcemods.getOrElse(mod.name, Seq()) ++ seqChildren
}
}