diff --git a/tools/update-core.sh b/tools/update-core.sh
index 4c9e7b0cc..db35a0af1 100755
--- a/tools/update-core.sh
+++ b/tools/update-core.sh
@@ -37,6 +37,7 @@ ln --symbolic `pwd`/deltachat-core/src     deltachat-android-ii/jni/messenger-ba
 ln --symbolic `pwd`/deltachat-core/libs    deltachat-android-ii/jni/messenger-backend/libs
 ln --symbolic `pwd`/deltachat-core/cmdline deltachat-android-ii/jni/messenger-backend/cmdline
 cd deltachat-android-ii
+ndk-build
 
 # back to tools directory
 cd tools