diff --git a/init/Android.mk b/init/Android.mk
index b52c949..1ca88d7 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -16,6 +16,14 @@
     -DREBOOT_BOOTLOADER_ON_PANIC=0
 endif
 
+ifneq (,$(filter eng,$(TARGET_BUILD_VARIANT)))
+init_options += \
+    -DSHUTDOWN_ZERO_TIMEOUT=1
+else
+init_options += \
+    -DSHUTDOWN_ZERO_TIMEOUT=0
+endif
+
 init_options += -DLOG_UEVENTS=0
 
 init_cflags += \
diff --git a/init/reboot.cpp b/init/reboot.cpp
index 2844d78..e34abdb 100644
--- a/init/reboot.cpp
+++ b/init/reboot.cpp
@@ -341,7 +341,14 @@
     }
 
     /* TODO update default waiting time based on usage data */
-    unsigned int shutdownTimeout = android::base::GetUintProperty("ro.build.shutdown_timeout", 10u);
+    constexpr unsigned int shutdownTimeoutDefault = 10;
+    unsigned int shutdownTimeout = shutdownTimeoutDefault;
+    if (SHUTDOWN_ZERO_TIMEOUT) {  // eng build
+        shutdownTimeout = 0;
+    } else {
+        shutdownTimeout =
+            android::base::GetUintProperty("ro.build.shutdown_timeout", shutdownTimeoutDefault);
+    }
     LOG(INFO) << "Shutdown timeout: " << shutdownTimeout;
 
     static const constexpr char* shutdown_critical_services[] = {"vold", "watchdogd"};