diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index cc47e16..c469627 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -507,6 +507,9 @@
         return BAD_VALUE;
     }
 
+    if (!display.get())
+        return NAME_NOT_FOUND;
+
     int32_t type = NAME_NOT_FOUND;
     for (int i=0 ; i<DisplayDevice::NUM_BUILTIN_DISPLAY_TYPES ; i++) {
         if (display == mBuiltinDisplays[i]) {