diff --git a/hal/UsbGadget.cpp b/hal/UsbGadget.cpp
index 65a8c09..10173e0 100644
--- a/hal/UsbGadget.cpp
+++ b/hal/UsbGadget.cpp
@@ -107,6 +107,8 @@
 
 Return<void> UsbGadget::getCurrentUsbFunctions(
     const sp<V1_0::IUsbGadgetCallback> &callback) {
+  if (!callback) return Void();
+
   Return<void> ret = callback->getCurrentUsbFunctionsCb(
       mCurrentUsbFunctions, mCurrentUsbFunctionsApplied
                                 ? Status::FUNCTIONS_APPLIED