diff --git a/java/com/facebook/soloader/ExternalSoMapping.java b/java/com/facebook/soloader/ExternalSoMapping.java
index 5b45904..4e5e09f 100644
--- a/java/com/facebook/soloader/ExternalSoMapping.java
+++ b/java/com/facebook/soloader/ExternalSoMapping.java
@@ -24,7 +24,7 @@
  * provide their own mapping from Open Source.
  */
 @ThreadSafe
-interface ExternalSoMapping {
+public interface ExternalSoMapping {
   @Nullable
   String mapLibName(String preMergedLibName);