diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3905cb21d9b8f4bb3c55e6e5c20b34fb9ad54431..1119c8200eb4f0bb1adf6894ba08ac9c43a7b33d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,6 +28,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-658 - Fix SQ8 Hybrid can't search
 - \#20 - C++ sdk example get grpc error 
 - \#23 - Add unittest to improve code coverage
+- \#31 - make clang-format failed after run build.sh -l
 
 ## Improvement
 - MS-552 - Add and change the easylogging library
diff --git a/core/build.sh b/core/build.sh
index 6697cfdfd20af52dce1e53e6e8fd0abf30c27b75..cd6f65201ba64bd8d2effc761d6c394efd6d7b7e 100755
--- a/core/build.sh
+++ b/core/build.sh
@@ -92,7 +92,7 @@ fi
 cd ${BUILD_OUTPUT_DIR}
 
 # remove make cache since build.sh -l use default variables
-# force update the variables each time 
+# force update the variables each time
 make rebuild_cache
 
 CMAKE_CMD="cmake \