diff --git a/app/build.gradle b/app/build.gradle
index 02216f837..a38c0b114 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -51,6 +51,7 @@ android {
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
+        main.java.srcDirs += 'src/proprietary/kotlin'
     }
 
     flavorDimensions "licensing"