diff --git a/paddle/scripts/paddle_build.sh b/paddle/scripts/paddle_build.sh
index 5f2c366efd9b043b551a88a42b39f703bd052b6b..c9f74127457e422ec4adab23b6d333e72250faf4 100755
--- a/paddle/scripts/paddle_build.sh
+++ b/paddle/scripts/paddle_build.sh
@@ -333,7 +333,7 @@ function assert_api_not_changed() {
     python ${PADDLE_ROOT}/tools/diff_api.py ${PADDLE_ROOT}/paddle/fluid/API.spec new.spec
     deactivate
 
-    API_CHANGE=`git diff --name-only HEAD^ | grep "paddle/fluid/API.spec" | true`
+    API_CHANGE=`git diff --name-only HEAD^ | grep "paddle/fluid/API.spec" || true`
     echo "checking API.spec change, PR: ${GIT_PR_ID}, changes: ${API_CHANGE}"
     if [ ${API_CHANGE} ] && [ "${GIT_PR_ID}" != "" ]; then
         # TODO: curl -H 'Authorization: token ${TOKEN}'