diff --git a/lite/tools/build.sh b/lite/tools/build.sh
index 2222b438596214bebb5194628f997503a9eb3368..002b71f043e0c6017762ec83311502056e8cb374 100755
--- a/lite/tools/build.sh
+++ b/lite/tools/build.sh
@@ -50,6 +50,7 @@ function prepare_thirdparty {
 
 function build_model_optimize_tool {
     cd $workspace
+    prepare_thirdparty
     mkdir -p build.model_optimize_tool
     cd build.model_optimize_tool
     cmake .. -DWITH_LITE=ON -DLITE_ON_MODEL_OPTIMIZE_TOOL=ON -DWITH_TESTING=OFF -DLITE_BUILD_EXTRA=ON