diff --git a/generate_descriptor_proto.sh b/generate_descriptor_proto.sh
index b6e6e07..cd90689 100755
--- a/generate_descriptor_proto.sh
+++ b/generate_descriptor_proto.sh
@@ -92,3 +92,8 @@
   PROCESS_ROUND=$((PROCESS_ROUND + 1))
 done
 cd ..
+
+if test -x objectivec/generate_descriptors_proto.sh; then
+  echo "Generating messages for objc."
+  objectivec/generate_descriptors_proto.sh $@
+fi