diff --git a/auto.sh b/auto.sh
index fe3feef..0404d0e 100755
--- a/auto.sh
+++ b/auto.sh
@@ -113,6 +113,7 @@ if [ "$FANCYINDEX" = 1 ]; then BUILD_MODULES="${BUILD_MODULES} --add-module=./li
 if [ "$GEOIP2" = 1 ]; then BUILD_MODULES="${BUILD_MODULES} --add-module=./lib/ngx_http_geoip2_module"; fi
 if [ "$VTS" = 1 ]; then BUILD_MODULES="${BUILD_MODULES} --add-module=./lib/nginx-module-vts"; fi
 if [ "$ZSTD" = 1 ]; then BUILD_MODULES="${BUILD_MODULES} --add-module=./lib/zstd-nginx-module"; fi
+if [ "$DYNAMIC_ETAG" = 1 ]; then BUILD_MODULES="${BUILD_MODULES} --add-module=./lib/ngx_dynamic_etag"; fi
 
 auto/configure \
 --with-cc-opt="-Wno-stringop-truncation -DTCP_FASTOPEN=23 ${BUILD_BIT}${BUILD_LTO} ${TEMP_OPT} -g -O3 -march=native -fstack-protector-strong -fuse-ld=gold -fuse-linker-plugin --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wno-strict-aliasing -Wp,-D_FORTIFY_SOURCE=2 -gsplit-dwarf -I./lib/boringssl/include -DNGX_HTTP_HEADERS" \