diff --git a/build-rust.sh b/build-rust.sh
index 4201bb4..c7954a2 100755
--- a/build-rust.sh
+++ b/build-rust.sh
@@ -6,4 +6,5 @@
 #    RUST_PROFILE=dev
 #fi
 RUST_PROFILE=release
+git submodule update --init
 cd pkg/libsignalgo/libsignal && RUSTFLAGS="-Ctarget-feature=-crt-static" RUSTC_WRAPPER="" cargo build -p libsignal-ffi --profile=$RUST_PROFILE