diff --git a/Celestia/src/main/cpp/CMakeLists.txt b/Celestia/src/main/cpp/CMakeLists.txt
index f5788353..56766f67 100644
--- a/Celestia/src/main/cpp/CMakeLists.txt
+++ b/Celestia/src/main/cpp/CMakeLists.txt
@@ -142,6 +142,7 @@ list(APPEND CELESTIA_SOURCES
         ${CELESTIA_SRC_DIR}/celmodel/modelfile.cpp
         ${CELESTIA_SRC_DIR}/celmodel/modelfile.h
         ${CELESTIA_SRC_DIR}/celmodel/model.h
+        ${CELESTIA_SRC_DIR}/celmodel/tangents.cpp
         )
 
 list(APPEND CELESTIA_SOURCES
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index ecc5bf0b..aa56076a 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -13,7 +13,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:installLocation="auto"
-    android:versionCode="426"
+    android:versionCode="427"
     android:versionName="1.5.28">
 
     <uses-feature android:name="android.hardware.type.pc" android:required="false" />