diff --git a/cluster/addons/fluentd-elasticsearch/fluentd-es-image/Dockerfile b/cluster/addons/fluentd-elasticsearch/fluentd-es-image/Dockerfile
index 25c8a120271..ccf2d3812e1 100644
--- a/cluster/addons/fluentd-elasticsearch/fluentd-es-image/Dockerfile
+++ b/cluster/addons/fluentd-elasticsearch/fluentd-es-image/Dockerfile
@@ -31,7 +31,7 @@ COPY Gemfile /Gemfile
 # 2. Install fluentd via ruby.
 # 3. Remove build dependencies.
 # 4. Cleanup leftover caches & files.
-RUN BUILD_DEPS="make gcc g++ libc6-dev ruby-dev" \
+RUN BUILD_DEPS="make gcc g++ libc6-dev ruby-dev libffi-dev" \
     && clean-install $BUILD_DEPS \
                      ca-certificates \
                      libjemalloc1 \