diff --git a/metadata/com.stonegate.tsacdop.yml b/metadata/com.stonegate.tsacdop.yml
index 23bdace82e..79a46d163c 100644
--- a/metadata/com.stonegate.tsacdop.yml
+++ b/metadata/com.stonegate.tsacdop.yml
@@ -37,6 +37,7 @@ Builds:
       - $$flutter$$/bin/flutter config --no-analytics
       - $$flutter$$/bin/flutter packages pub get
       - $$flutter$$/bin/flutter build apk --flavor=fdroid
+    ndk: r21d
 
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