diff --git a/httplib.h b/httplib.h
index 4268323..7027533 100644
--- a/httplib.h
+++ b/httplib.h
@@ -2867,6 +2867,7 @@ inline bool can_compress_content_type(const std::string &content_type) {
          content_type == "application/javascript" ||
          content_type == "application/json" ||
          content_type == "application/xml" ||
+         content_type == "application/protobuf" ||
          content_type == "application/xhtml+xml";
 }