diff --git a/adb/adb.cpp b/adb/adb.cpp
index 808d8ff..a7706a0 100644
--- a/adb/adb.cpp
+++ b/adb/adb.cpp
@@ -1140,6 +1140,7 @@
         if (should_use_libusb()) {
             features.insert(kFeatureLibusb);
         }
+        features.insert(kFeaturePushSync);
         SendOkay(reply_fd, FeatureSetToString(features));
         return 0;
     }
diff --git a/adb/transport.cpp b/adb/transport.cpp
index 24e90cf..308ee8d 100644
--- a/adb/transport.cpp
+++ b/adb/transport.cpp
@@ -55,6 +55,7 @@
 const char* const kFeatureCmd = "cmd";
 const char* const kFeatureStat2 = "stat_v2";
 const char* const kFeatureLibusb = "libusb";
+const char* const kFeaturePushSync = "push_sync";
 
 static std::string dump_packet(const char* name, const char* func, apacket* p) {
     unsigned command = p->msg.command;
diff --git a/adb/transport.h b/adb/transport.h
index 7304404..57fc988 100644
--- a/adb/transport.h
+++ b/adb/transport.h
@@ -51,6 +51,8 @@
 extern const char* const kFeatureStat2;
 // The server is running with libusb enabled.
 extern const char* const kFeatureLibusb;
+// The server supports `push --sync`.
+extern const char* const kFeaturePushSync;
 
 class atransport {
 public: