diff --git a/libs/binder/Binder.cpp b/libs/binder/Binder.cpp
index 0970ca5..01b25d3 100644
--- a/libs/binder/Binder.cpp
+++ b/libs/binder/Binder.cpp
@@ -19,6 +19,7 @@
 #include <atomic>
 #include <set>
 
+#include <android-base/logging.h>
 #include <android-base/unique_fd.h>
 #include <binder/BpBinder.h>
 #include <binder/IInterface.h>
@@ -281,9 +282,11 @@
             err = pingBinder();
             break;
         case EXTENSION_TRANSACTION:
+            CHECK(reply != nullptr);
             err = reply->writeStrongBinder(getExtension());
             break;
         case DEBUG_PID_TRANSACTION:
+            CHECK(reply != nullptr);
             err = reply->writeInt32(getDebugPid());
             break;
         case SET_RPC_CLIENT_TRANSACTION: {
@@ -590,6 +593,7 @@
 {
     switch (code) {
         case INTERFACE_TRANSACTION:
+            CHECK(reply != nullptr);
             reply->writeString16(getInterfaceDescriptor());
             return NO_ERROR;