diff --git a/graphics/mapper/4.0/vts/functional/VtsHalGraphicsMapperV4_0TargetTest.cpp b/graphics/mapper/4.0/vts/functional/VtsHalGraphicsMapperV4_0TargetTest.cpp
index 0d6f5af..295ba36 100644
--- a/graphics/mapper/4.0/vts/functional/VtsHalGraphicsMapperV4_0TargetTest.cpp
+++ b/graphics/mapper/4.0/vts/functional/VtsHalGraphicsMapperV4_0TargetTest.cpp
@@ -727,8 +727,10 @@
 
     int fence;
     ASSERT_NO_FATAL_FAILURE(fence = mGralloc->flushLockedBuffer(writeBufferHandle));
-    ASSERT_EQ(0, sync_wait(fence, 3500));
-    close(fence);
+    if (fence >= 0) {
+        ASSERT_EQ(0, sync_wait(fence, 3500));
+        close(fence);
+    }
 
     ASSERT_NO_FATAL_FAILURE(mGralloc->rereadLockedBuffer(readBufferHandle));