diff --git a/libs/gui/Surface.cpp b/libs/gui/Surface.cpp
index 7b2b5c3..5bee7a4 100644
--- a/libs/gui/Surface.cpp
+++ b/libs/gui/Surface.cpp
@@ -153,7 +153,10 @@
     ATRACE_CALL();
 
     DisplayStatInfo stats;
-    status_t err = composerService()->getDisplayStats(NULL, &stats);
+    status_t result = composerService()->getDisplayStats(NULL, &stats);
+    if (result != NO_ERROR) {
+        return result;
+    }
 
     *outRefreshDuration = stats.vsyncPeriod;