diff --git a/library/kotlin/io/envoyproxy/envoymobile/RequestTrailersBuilder.kt b/library/kotlin/io/envoyproxy/envoymobile/RequestTrailersBuilder.kt
index 26b57e56eb..085a1bc775 100644
--- a/library/kotlin/io/envoyproxy/envoymobile/RequestTrailersBuilder.kt
+++ b/library/kotlin/io/envoyproxy/envoymobile/RequestTrailersBuilder.kt
@@ -7,7 +7,7 @@ class RequestTrailersBuilder : HeadersBuilder {
   /*
    * Instantiate a new builder.
    */
-  internal constructor() : super(HeadersContainer(mapOf()))
+  constructor() : super(HeadersContainer(mapOf()))
 
   /*
    * Instantiate a new instance of the builder.
diff --git a/library/kotlin/io/envoyproxy/envoymobile/ResponseHeadersBuilder.kt b/library/kotlin/io/envoyproxy/envoymobile/ResponseHeadersBuilder.kt
index 4c57f9526f..93254aaac8 100644
--- a/library/kotlin/io/envoyproxy/envoymobile/ResponseHeadersBuilder.kt
+++ b/library/kotlin/io/envoyproxy/envoymobile/ResponseHeadersBuilder.kt
@@ -8,7 +8,7 @@ class ResponseHeadersBuilder : HeadersBuilder {
   /*
    * Instantiate a new builder.
    */
-  internal constructor() : super(HeadersContainer(mapOf()))
+  constructor() : super(HeadersContainer(mapOf()))
 
   /*
    * Instantiate a new builder. Used only by ResponseHeaders to convert back to