diff --git a/lite/tools/build_bm.sh b/lite/tools/build_bm.sh
index 055f6a35c3ab145e9dfe4bc5d46172a2119ffb25..53f62695bcba061637956a52c1cd12c2e8b3c1c5 100755
--- a/lite/tools/build_bm.sh
+++ b/lite/tools/build_bm.sh
@@ -103,6 +103,9 @@ function main {
             --target_name=*)
                 TARGET_NAME="${i#*=}"
                 build_bm
+                shift
+                ;;
+            *)
                 # unknown option
                 print_usage
                 exit 1
@@ -110,5 +113,4 @@ function main {
         esac
     done
 }
-
 main $@