diff --git a/transport/HidlTransportUtils.cpp b/transport/HidlTransportUtils.cpp
index 4e952eb..8c61281 100644
--- a/transport/HidlTransportUtils.cpp
+++ b/transport/HidlTransportUtils.cpp
@@ -56,6 +56,10 @@
 }
 
 std::string getDescriptor(IBase* interface) {
+    if (interface == nullptr) {
+        return "";
+    }
+
     std::string myDescriptor{};
     auto ret = interface->interfaceDescriptor([&](const hidl_string &types) {
         myDescriptor = types.c_str();