diff --git a/include/ui/FramebufferNativeWindow.h b/include/ui/FramebufferNativeWindow.h
index b202b95..8dd2109 100644
--- a/include/ui/FramebufferNativeWindow.h
+++ b/include/ui/FramebufferNativeWindow.h
@@ -28,7 +28,8 @@
 #include <ui/ANativeObjectBase.h>
 #include <ui/Rect.h>
 
-#define NUM_FRAME_BUFFERS  2
+#define MIN_NUM_FRAME_BUFFERS  2
+#define MAX_NUM_FRAME_BUFFERS  3
 
 extern "C" EGLNativeWindowType android_createDisplaySurface(void);
 
@@ -74,7 +75,7 @@
     framebuffer_device_t* fbDev;
     alloc_device_t* grDev;
 
-    sp<NativeBuffer> buffers[NUM_FRAME_BUFFERS];
+    sp<NativeBuffer> buffers[MAX_NUM_FRAME_BUFFERS];
     sp<NativeBuffer> front;
     
     mutable Mutex mutex;